ASoC: q6afe: Remove unused q6afe_is_rx_port() function

This reverts commit 4a957374 ("ASoc: q6afe: add support to get
port direction"), since the function is not needed anymore.

q6afe-dai already exposes the possible directions for a DAI through
the DAI capabilities (playback/capture-only DAI). Now we use
snd_soc_dai_link_set_capabilities() to infer the information
directly from the DAI capabilities.
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200723183904.321040-4-stephan@gerhold.netSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/qcom/qdsp6/q6afe.c

@@ -800,14 +800,6 @@ int q6afe_get_port_id(int index)
 }
 EXPORT_SYMBOL_GPL(q6afe_get_port_id);
 
-int q6afe_is_rx_port(int index)
-{
-	if (index < 0 || index >= AFE_PORT_MAX)
-		return -EINVAL;
-
-	return port_maps[index].is_rx;
-}
-EXPORT_SYMBOL_GPL(q6afe_is_rx_port);
 static int afe_apr_send_pkt(struct q6afe *afe, struct apr_pkt *pkt,
 			    struct q6afe_port *port)
 {

sound/soc/qcom/qdsp6/q6afe.h

@@ -198,7 +198,6 @@ int q6afe_port_start(struct q6afe_port *port);
 int q6afe_port_stop(struct q6afe_port *port);
 void q6afe_port_put(struct q6afe_port *port);
 int q6afe_get_port_id(int index);
-int q6afe_is_rx_port(int index);
 void q6afe_hdmi_port_prepare(struct q6afe_port *port,
 			    struct q6afe_hdmi_cfg *cfg);
 void q6afe_slim_port_prepare(struct q6afe_port *port,