ALSA: via82xx: 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>
diff --git a/sound/pci/via82xx_modem.c b/sound/pci/via82xx_modem.c
index 2f6d40f..55f79b2 100644
--- a/sound/pci/via82xx_modem.c
+++ b/sound/pci/via82xx_modem.c
@@ -744,8 +744,8 @@ static int snd_via82xx_modem_pcm_open(struct via82xx_modem *chip, struct viadev
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	int err;
-        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,