[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>
diff --git a/include/sound/soc.h b/include/sound/soc.h
index db6edba..f47ef1f 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -201,8 +201,7 @@
 	struct snd_ctl_elem_info *uinfo);
 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
 	struct snd_ctl_elem_info *uinfo);
-int snd_soc_info_bool_ext(struct snd_kcontrol *kcontrol,
-	struct snd_ctl_elem_info *uinfo);
+#define snd_soc_info_bool_ext		snd_ctl_boolean_mono
 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
 	struct snd_ctl_elem_value *ucontrol);
 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,