ASoC: intel: byt: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Acked-By: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/bytcht_nocodec.c

@@ -85,11 +85,11 @@ static int codec_fixup(struct snd_soc_pcm_runtime *rtd,
 	return 0;
 }
 
-static unsigned int rates_48000[] = {
+static const unsigned int rates_48000[] = {
 	48000,
 };
 
-static struct snd_pcm_hw_constraint_list constraints_48000 = {
+static const struct snd_pcm_hw_constraint_list constraints_48000 = {
 	.count = ARRAY_SIZE(rates_48000),
 	.list  = rates_48000,
 };

sound/soc/intel/boards/bytcr_rt5651.c

@@ -203,11 +203,11 @@ static int byt_rt5651_codec_fixup(struct snd_soc_pcm_runtime *rtd,
 	return 0;
 }
 
-static unsigned int rates_48000[] = {
+static const unsigned int rates_48000[] = {
 	48000,
 };
 
-static struct snd_pcm_hw_constraint_list constraints_48000 = {
+static const struct snd_pcm_hw_constraint_list constraints_48000 = {
 	.count = ARRAY_SIZE(rates_48000),
 	.list  = rates_48000,
 };