ALSA: hda: ext: make snd_hdac_ext_stream_init() static

There are no external users of this helper, move to static and remove
sympol export. No functionality change.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20220919121041.43463-4-pierre-louis.bossart@linux.intel.comSigned-off-by: Takashi Iwai <tiwai@suse.de>

include/sound/hdaudio_ext.h

@@ -77,9 +77,6 @@ struct hdac_ext_stream {
 #define stream_to_hdac_ext_stream(s) \
 	container_of(s, struct hdac_ext_stream, hstream)
 
-void snd_hdac_ext_stream_init(struct hdac_bus *bus,
-			      struct hdac_ext_stream *hext_stream, int idx,
-			      int direction, int tag);
 int snd_hdac_ext_stream_init_all(struct hdac_bus *bus, int start_idx,
 				 int num_stream, int dir);
 void snd_hdac_stream_free_all(struct hdac_bus *bus);

sound/hda/ext/hdac_ext_stream.c

@@ -26,9 +26,9 @@
  * initialize the stream, if ppcap is enabled then init those and then
  * invoke hdac stream initialization routine
  */
-void snd_hdac_ext_stream_init(struct hdac_bus *bus,
-			      struct hdac_ext_stream *hext_stream,
-			      int idx, int direction, int tag)
+static void snd_hdac_ext_stream_init(struct hdac_bus *bus,
+				     struct hdac_ext_stream *hext_stream,
+				     int idx, int direction, int tag)
 {
 	if (bus->ppcap) {
 		hext_stream->pphc_addr = bus->ppcap + AZX_PPHC_BASE +
@@ -56,7 +56,6 @@ void snd_hdac_ext_stream_init(struct hdac_bus *bus,
 	hext_stream->decoupled = false;
 	snd_hdac_stream_init(bus, &hext_stream->hstream, idx, direction, tag);
 }
-EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_init);
 
 /**
  * snd_hdac_ext_stream_init_all - create and initialize the stream objects