Use snd_ctl_boolean_mono_info callback to simplify.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
        return retval;
 }
 
-static int snd_at73c213_mono_switch_info(struct snd_kcontrol *kcontrol,
-                                 struct snd_ctl_elem_info *uinfo)
-{
-       uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
-       uinfo->count = 1;
-       uinfo->value.integer.min = 0;
-       uinfo->value.integer.max = 1;
-
-       return 0;
-}
+#define snd_at73c213_mono_switch_info  snd_ctl_boolean_mono_info
 
 static int snd_at73c213_mono_switch_get(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)