[ALSA] Clean up with common snd_ctl_boolean_*_info callbacks

Clean up codes using the new common snd_ctl_boolean_*_info() callbacks.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

sound/drivers/dummy.c

@@ -510,15 +510,7 @@ static const DECLARE_TLV_DB_SCALE(db_scale_dummy, -4500, 30, 0);
   .get = snd_dummy_capsrc_get, .put = snd_dummy_capsrc_put, \
   .private_value = addr }
 
-static int snd_dummy_capsrc_info(struct snd_kcontrol *kcontrol,
-				 struct snd_ctl_elem_info *uinfo)
-{
-	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
-	uinfo->count = 2;
-	uinfo->value.integer.min = 0;
-	uinfo->value.integer.max = 1;
-	return 0;
-}
+#define snd_dummy_capsrc_info	snd_ctl_boolean_stereo_info
  
 static int snd_dummy_capsrc_get(struct snd_kcontrol *kcontrol,
 				struct snd_ctl_elem_value *ucontrol)