ASoC: spear: merge .digital_mute() into .mute_stream()

snd_soc_dai_digital_mute() is internally using both
mute_stream() (1) or digital_mute() (2), but the difference between
these 2 are only handling direction.
We can merge digital_mute() into mute_stream

	int snd_soc_dai_digital_mute(xxx, int direction)
	{
		...
		else if (dai->driver->ops->mute_stream)
(1)			return dai->driver->ops->mute_stream(xxx, direction);
		else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
			 dai->driver->ops->digital_mute)
(2)			return dai->driver->ops->digital_mute(xxx);
		...
	}
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/87a709xxij.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/spear/spdif_out.c

@@ -188,7 +188,7 @@ static int spdif_out_trigger(struct snd_pcm_substream *substream, int cmd,
 	return ret;
 }
 
-static int spdif_digital_mute(struct snd_soc_dai *dai, int mute)
+static int spdif_mute(struct snd_soc_dai *dai, int mute, int direction)
 {
 	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);
 	u32 val;
@@ -229,7 +229,8 @@ static int spdif_mute_put(struct snd_kcontrol *kcontrol,
 	if (host->saved_params.mute == ucontrol->value.integer.value[0])
 		return 0;
 
-	spdif_digital_mute(cpu_dai, ucontrol->value.integer.value[0]);
+	spdif_mute(cpu_dai, ucontrol->value.integer.value[0],
+		   SNDRV_PCM_STREAM_PLAYBACK);
 
 	return 1;
 }
@@ -250,11 +251,12 @@ static int spdif_soc_dai_probe(struct snd_soc_dai *dai)
 }
 
 static const struct snd_soc_dai_ops spdif_out_dai_ops = {
-	.digital_mute	= spdif_digital_mute,
+	.mute_stream	= spdif_mute,
 	.startup	= spdif_out_startup,
 	.shutdown	= spdif_out_shutdown,
 	.trigger	= spdif_out_trigger,
 	.hw_params	= spdif_out_hw_params,
+	.no_capture_mute = 1,
 };
 
 static struct snd_soc_dai_driver spdif_out_dai = {