ALSA: aoa: Use snd_ctl_elem_info()

... and reduce the open codes.  Also add missing const to text arrays.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/aoa/codecs/onyx.c b/sound/aoa/codecs/onyx.c
index 401107b..23c371ec 100644
--- a/sound/aoa/codecs/onyx.c
+++ b/sound/aoa/codecs/onyx.c
@@ -243,13 +243,7 @@
 {
 	static const char * const texts[] = { "Line-In", "Microphone" };
 
-	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
-	uinfo->count = 1;
-	uinfo->value.enumerated.items = 2;
-	if (uinfo->value.enumerated.item > 1)
-		uinfo->value.enumerated.item = 1;
-	strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
-	return 0;
+	return snd_ctl_enum_info(uinfo, 1, 2, texts);
 }
 
 static int onyx_snd_capture_source_get(struct snd_kcontrol *kcontrol,
diff --git a/sound/aoa/codecs/tas.c b/sound/aoa/codecs/tas.c
index cf3c630..364c7c4 100644
--- a/sound/aoa/codecs/tas.c
+++ b/sound/aoa/codecs/tas.c
@@ -478,15 +478,9 @@
 static int tas_snd_capture_source_info(struct snd_kcontrol *kcontrol,
 	struct snd_ctl_elem_info *uinfo)
 {
-	static char *texts[] = { "Line-In", "Microphone" };
+	static const char * const texts[] = { "Line-In", "Microphone" };
 
-	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
-	uinfo->count = 1;
-	uinfo->value.enumerated.items = 2;
-	if (uinfo->value.enumerated.item > 1)
-		uinfo->value.enumerated.item = 1;
-	strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
-	return 0;
+	return snd_ctl_enum_info(uinfo, 1, 2, texts);
 }
 
 static int tas_snd_capture_source_get(struct snd_kcontrol *kcontrol,