ALSA: ice17xx: Constify strings and string arrays

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/ice1712/phase.c b/sound/pci/ice1712/phase.c
index de29be8..79204e2 100644
--- a/sound/pci/ice1712/phase.c
+++ b/sound/pci/ice1712/phase.c
@@ -722,7 +722,7 @@
 static int phase28_oversampling_info(struct snd_kcontrol *k,
 					struct snd_ctl_elem_info *uinfo)
 {
-	static char *texts[2] = { "128x", "64x"	};
+	static const char * const texts[2] = { "128x", "64x"	};
 
 	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
 	uinfo->count = 1;