ALSA: intel8x0: 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>

sound/pci/intel8x0.c

@@ -1136,31 +1136,31 @@ static struct snd_pcm_hardware snd_intel8x0_stream =
 	.fifo_size =		0,
 };
 
-static unsigned int channels4[] = {
+static const unsigned int channels4[] = {
 	2, 4,
 };
 
-static struct snd_pcm_hw_constraint_list hw_constraints_channels4 = {
+static const struct snd_pcm_hw_constraint_list hw_constraints_channels4 = {
 	.count = ARRAY_SIZE(channels4),
 	.list = channels4,
 	.mask = 0,
 };
 
-static unsigned int channels6[] = {
+static const unsigned int channels6[] = {
 	2, 4, 6,
 };
 
-static struct snd_pcm_hw_constraint_list hw_constraints_channels6 = {
+static const struct snd_pcm_hw_constraint_list hw_constraints_channels6 = {
 	.count = ARRAY_SIZE(channels6),
 	.list = channels6,
 	.mask = 0,
 };
 
-static unsigned int channels8[] = {
+static const unsigned int channels8[] = {
 	2, 4, 6, 8,
 };
 
-static struct snd_pcm_hw_constraint_list hw_constraints_channels8 = {
+static const struct snd_pcm_hw_constraint_list hw_constraints_channels8 = {
 	.count = ARRAY_SIZE(channels8),
 	.list = channels8,
 	.mask = 0,

sound/pci/intel8x0m.c

@@ -635,8 +635,8 @@ static struct snd_pcm_hardware snd_intel8x0m_stream =
 
 static int snd_intel8x0m_pcm_open(struct snd_pcm_substream *substream, struct ichdev *ichdev)
 {
-	static unsigned int rates[] = { 8000,  9600, 12000, 16000 };
-	static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
+	static const unsigned int rates[] = { 8000,  9600, 12000, 16000 };
+	static const struct snd_pcm_hw_constraint_list hw_constraints_rates = {
 		.count = ARRAY_SIZE(rates),
 		.list = rates,
 		.mask = 0,