[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/sound/pci/trident/trident_main.c b/sound/pci/trident/trident_main.c
index 7ca6062..00e4004 100644
--- a/sound/pci/trident/trident_main.c
+++ b/sound/pci/trident/trident_main.c
@@ -2317,15 +2317,7 @@
     Description: enable/disable S/PDIF out from ac97 mixer
   ---------------------------------------------------------------------------*/
 
-static int snd_trident_spdif_control_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_trident_spdif_control_info	snd_ctl_boolean_mono_info
 
 static int snd_trident_spdif_control_get(struct snd_kcontrol *kcontrol,
 					 struct snd_ctl_elem_value *ucontrol)
@@ -2545,15 +2537,7 @@
     Description: enable/disable rear path for ac97
   ---------------------------------------------------------------------------*/
 
-static int snd_trident_ac97_control_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_trident_ac97_control_info	snd_ctl_boolean_mono_info
 
 static int snd_trident_ac97_control_get(struct snd_kcontrol *kcontrol,
 					struct snd_ctl_elem_value *ucontrol)