ALSA: hda - consitify string arrays

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/patch_cmedia.c b/sound/pci/hda/patch_cmedia.c
index ff60908..1f8bbcd 100644
--- a/sound/pci/hda/patch_cmedia.c
+++ b/sound/pci/hda/patch_cmedia.c
@@ -608,7 +608,7 @@
 /*
  */
 
-static const char *cmi9880_models[CMI_MODELS] = {
+static const char * const cmi9880_models[CMI_MODELS] = {
 	[CMI_MINIMAL]	= "minimal",
 	[CMI_MIN_FP]	= "min_fp",
 	[CMI_FULL]	= "full",