ASoC: soc-component: add snd_soc_component_suspend()

Current ALSA SoC is directly using component->driver->xxx,
thus, it is deep nested, and makes code difficult to read,
and is not good for encapsulation.
This patch adds new snd_soc_component_suspend() and use it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/877e855rn0.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

include/sound/soc-component.h

@@ -353,5 +353,6 @@ int snd_soc_component_hw_free(struct snd_soc_component *component,
 int snd_soc_component_trigger(struct snd_soc_component *component,
 			      struct snd_pcm_substream *substream,
 			      int cmd);
+void snd_soc_component_suspend(struct snd_soc_component *component);
 
 #endif /* __SOC_COMPONENT_H */

sound/soc/soc-component.c

@@ -347,3 +347,10 @@ int snd_soc_component_trigger(struct snd_soc_component *component,
 
 	return 0;
 }
+
+void snd_soc_component_suspend(struct snd_soc_component *component)
+{
+	if (component->driver->suspend)
+		component->driver->suspend(component);
+	component->suspended = 1;
+}

sound/soc/soc-core.c

@@ -520,9 +520,7 @@ int snd_soc_suspend(struct device *dev)
 				/* fall through */
 
 			case SND_SOC_BIAS_OFF:
-				if (component->driver->suspend)
-					component->driver->suspend(component);
-				component->suspended = 1;
+				snd_soc_component_suspend(component);
 				if (component->regmap)
 					regcache_mark_dirty(component->regmap);
 				/* deactivate pins to sleep state */