ASoC: fsl_easrc: Fix -Wmissing-prototypes warning

Obtained with:
$ make W=1

sound/soc/fsl/fsl_easrc.c:967:5: warning: no previous prototype for function 'fsl_easrc_config_context' [-Wmissing-prototypes]
int fsl_easrc_config_context(struct fsl_asrc *easrc, unsigned int ctx_id)
    ^
sound/soc/fsl/fsl_easrc.c:967:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int fsl_easrc_config_context(struct fsl_asrc *easrc, unsigned int ctx_id)
^
static
sound/soc/fsl/fsl_easrc.c:1128:5: warning: no previous prototype for function 'fsl_easrc_set_ctx_format' [-Wmissing-prototypes]
int fsl_easrc_set_ctx_format(struct fsl_asrc_pair *ctx,
    ^
sound/soc/fsl/fsl_easrc.c:1128:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int fsl_easrc_set_ctx_format(struct fsl_asrc_pair *ctx,
^
static
sound/soc/fsl/fsl_easrc.c:1201:5: warning: no previous prototype for function 'fsl_easrc_set_ctx_organziation' [-Wmissing-prototypes]
int fsl_easrc_set_ctx_organziation(struct fsl_asrc_pair *ctx)
    ^
sound/soc/fsl/fsl_easrc.c:1201:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int fsl_easrc_set_ctx_organziation(struct fsl_asrc_pair *ctx)
^
static
sound/soc/fsl/fsl_easrc.c:1245:5: warning: no previous prototype for function 'fsl_easrc_request_context' [-Wmissing-prototypes]
int fsl_easrc_request_context(int channels, struct fsl_asrc_pair *ctx)
    ^
sound/soc/fsl/fsl_easrc.c:1245:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int fsl_easrc_request_context(int channels, struct fsl_asrc_pair *ctx)
^
static
sound/soc/fsl/fsl_easrc.c:1290:6: warning: no previous prototype for function 'fsl_easrc_release_context' [-Wmissing-prototypes]
void fsl_easrc_release_context(struct fsl_asrc_pair *ctx)
     ^
sound/soc/fsl/fsl_easrc.c:1290:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void fsl_easrc_release_context(struct fsl_asrc_pair *ctx)
^
static
sound/soc/fsl/fsl_easrc.c:1317:5: warning: no previous prototype for function 'fsl_easrc_start_context' [-Wmissing-prototypes]
int fsl_easrc_start_context(struct fsl_asrc_pair *ctx)
    ^
sound/soc/fsl/fsl_easrc.c:1317:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int fsl_easrc_start_context(struct fsl_asrc_pair *ctx)
^
static
sound/soc/fsl/fsl_easrc.c:1335:5: warning: no previous prototype for function 'fsl_easrc_stop_context' [-Wmissing-prototypes]
int fsl_easrc_stop_context(struct fsl_asrc_pair *ctx)
    ^
sound/soc/fsl/fsl_easrc.c:1335:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int fsl_easrc_stop_context(struct fsl_asrc_pair *ctx)
^
static
sound/soc/fsl/fsl_easrc.c:1382:18: warning: no previous prototype for function 'fsl_easrc_get_dma_channel' [-Wmissing-prototypes]
struct dma_chan *fsl_easrc_get_dma_channel(struct fsl_asrc_pair *ctx,
                 ^
sound/soc/fsl/fsl_easrc.c:1382:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
struct dma_chan *fsl_easrc_get_dma_channel(struct fsl_asrc_pair *ctx,
^
static

Fixes: 955ac624 ("ASoC: fsl_easrc: Add EASRC ASoC CPU DAI drivers")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Acked-by: Nicolin Chen <nicoleotsuka@gmail.com>
Link: https://lore.kernel.org/r/ab1b83a56c71f4159a98e6da5602c2c36fe59f4d.1591155860.git.shengjiu.wang@nxp.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/fsl/fsl_easrc.c

@@ -964,7 +964,7 @@ static int fsl_easrc_release_slot(struct fsl_asrc *easrc, unsigned int ctx_id)
  *
  * Configure the register relate with context.
  */
-int fsl_easrc_config_context(struct fsl_asrc *easrc, unsigned int ctx_id)
+static int fsl_easrc_config_context(struct fsl_asrc *easrc, unsigned int ctx_id)
 {
 	struct fsl_easrc_ctx_priv *ctx_priv;
 	struct fsl_asrc_pair *ctx;
@@ -1125,9 +1125,9 @@ static int fsl_easrc_process_format(struct fsl_asrc_pair *ctx,
 	return 0;
 }
 
-int fsl_easrc_set_ctx_format(struct fsl_asrc_pair *ctx,
-			     snd_pcm_format_t *in_raw_format,
-			     snd_pcm_format_t *out_raw_format)
+static int fsl_easrc_set_ctx_format(struct fsl_asrc_pair *ctx,
+				    snd_pcm_format_t *in_raw_format,
+				    snd_pcm_format_t *out_raw_format)
 {
 	struct fsl_asrc *easrc = ctx->asrc;
 	struct fsl_easrc_ctx_priv *ctx_priv = ctx->private;
@@ -1198,7 +1198,7 @@ int fsl_easrc_set_ctx_format(struct fsl_asrc_pair *ctx,
  * to conform with this format. Interleaving parameters are accessed
  * through the ASRC_CTRL_IN_ACCESSa and ASRC_CTRL_OUT_ACCESSa registers
  */
-int fsl_easrc_set_ctx_organziation(struct fsl_asrc_pair *ctx)
+static int fsl_easrc_set_ctx_organziation(struct fsl_asrc_pair *ctx)
 {
 	struct fsl_easrc_ctx_priv *ctx_priv;
 	struct device *dev;
@@ -1242,7 +1242,7 @@ int fsl_easrc_set_ctx_organziation(struct fsl_asrc_pair *ctx)
  * Returns a negative number on error and >=0 as context id
  * on success
  */
-int fsl_easrc_request_context(int channels, struct fsl_asrc_pair *ctx)
+static int fsl_easrc_request_context(int channels, struct fsl_asrc_pair *ctx)
 {
 	enum asrc_pair_index index = ASRC_INVALID_PAIR;
 	struct fsl_asrc *easrc = ctx->asrc;
@@ -1287,7 +1287,7 @@ int fsl_easrc_request_context(int channels, struct fsl_asrc_pair *ctx)
  *
  * This funciton is mainly doing the revert thing in request context
  */
-void fsl_easrc_release_context(struct fsl_asrc_pair *ctx)
+static void fsl_easrc_release_context(struct fsl_asrc_pair *ctx)
 {
 	unsigned long lock_flags;
 	struct fsl_asrc *easrc;
@@ -1314,7 +1314,7 @@ void fsl_easrc_release_context(struct fsl_asrc_pair *ctx)
  *
  * Enable the DMA request and context
  */
-int fsl_easrc_start_context(struct fsl_asrc_pair *ctx)
+static int fsl_easrc_start_context(struct fsl_asrc_pair *ctx)
 {
 	struct fsl_asrc *easrc = ctx->asrc;
 
@@ -1332,7 +1332,7 @@ int fsl_easrc_start_context(struct fsl_asrc_pair *ctx)
  *
  * Disable the DMA request and context
  */
-int fsl_easrc_stop_context(struct fsl_asrc_pair *ctx)
+static int fsl_easrc_stop_context(struct fsl_asrc_pair *ctx)
 {
 	struct fsl_asrc *easrc = ctx->asrc;
 	int val, i;
@@ -1379,8 +1379,8 @@ int fsl_easrc_stop_context(struct fsl_asrc_pair *ctx)
 	return 0;
 }
 
-struct dma_chan *fsl_easrc_get_dma_channel(struct fsl_asrc_pair *ctx,
-					   bool dir)
+static struct dma_chan *fsl_easrc_get_dma_channel(struct fsl_asrc_pair *ctx,
+						  bool dir)
 {
 	struct fsl_asrc *easrc = ctx->asrc;
 	enum asrc_pair_index index = ctx->index;
@@ -1391,7 +1391,6 @@ struct dma_chan *fsl_easrc_get_dma_channel(struct fsl_asrc_pair *ctx,
 
 	return dma_request_slave_channel(&easrc->pdev->dev, name);
 };
-EXPORT_SYMBOL_GPL(fsl_easrc_get_dma_channel);
 
 static const unsigned int easrc_rates[] = {
 	8000, 11025, 12000, 16000,