[ALSA] soc - Fix power switching support for DAPM_SWITCH widgets

Signed-off-by: Milan plzik <milan.plzik@gmail.com>
Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

sound/soc/soc-dapm.c

@@ -691,7 +691,7 @@ static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
 	return 0;
 }
 
-/* test and update the power status of a mixer widget */
+/* test and update the power status of a mixer or switch widget */
 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
 				   struct snd_kcontrol *kcontrol, int reg,
 				   int val_mask, int val, int invert)
@@ -699,7 +699,8 @@ static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
 	struct snd_soc_dapm_path *path;
 	int found = 0;
 
-	if (widget->id != snd_soc_dapm_mixer)
+	if (widget->id != snd_soc_dapm_mixer &&
+	    widget->id != snd_soc_dapm_switch)
 		return -ENODEV;
 
 	if (!snd_soc_test_bits(widget->codec, reg, val_mask, val))