ALSA: sound/aoa/codecs/onyx.c: use static const for texts

'texts' is only used as source in strcpy
Signed-off-by: NFabian Frederick <fabf@skynet.be>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/aoa/codecs/onyx.c

@@ -241,7 +241,7 @@ static struct snd_kcontrol_new inputgain_control = {
 static int onyx_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;