ASoC: soc-dai: remove .digital_mute

All drivers are now using .mute_stream.
Let's remove .digital_mute.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/87h7u72dqz.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

include/sound/soc-dai.h

@@ -246,7 +246,6 @@ struct snd_soc_dai_ops {
 	 * DAI digital mute - optional.
 	 * Called by soc-core to minimise any pops.
 	 */
-	int (*digital_mute)(struct snd_soc_dai *dai, int mute);
 	int (*mute_stream)(struct snd_soc_dai *dai, int mute, int stream);
 
 	/*

sound/soc/soc-dai.c

@@ -307,10 +307,6 @@ int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
 	    (direction == SNDRV_PCM_STREAM_PLAYBACK ||
 	     !dai->driver->ops->no_capture_mute))
 		ret = dai->driver->ops->mute_stream(dai, mute, direction);
-	else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
-		 dai->driver->ops &&
-		 dai->driver->ops->digital_mute)
-		ret = dai->driver->ops->digital_mute(dai, mute);
 
 	return soc_dai_ret(dai, ret);
 }