ASoC: don't set dapm->bias_level directly

Merge series from Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>:

We have many set_bias_level functions, thus dapm->bias_level should be
handled by owner function, not by its callback functions.

Author: broonie

sound/soc/codecs/rt700.c

@@ -861,7 +861,7 @@ static int rt700_set_bias_level(struct snd_soc_component *component,
 	default:
 		break;
 	}
-	dapm->bias_level = level;
+
 	return 0;
 }
 

sound/soc/codecs/rt715.c

@@ -775,7 +775,7 @@ static int rt715_set_bias_level(struct snd_soc_component *component,
 	default:
 		break;
 	}
-	dapm->bias_level = level;
+
 	return 0;
 }