ALSA: mips: make snd_pcm_hardware const

Make these const as they are only used in a copy operation.
Done using Coccinelle

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/mips/sgio2audio.c b/sound/mips/sgio2audio.c
index 0ebc1c3..603892f 100644
--- a/sound/mips/sgio2audio.c
+++ b/sound/mips/sgio2audio.c
@@ -532,7 +532,7 @@ static irqreturn_t snd_sgio2audio_error_isr(int irq, void *dev_id)
 
 /* PCM part */
 /* PCM hardware definition */
-static struct snd_pcm_hardware snd_sgio2audio_pcm_hw = {
+static const struct snd_pcm_hardware snd_sgio2audio_pcm_hw = {
 	.info = (SNDRV_PCM_INFO_MMAP |
 		 SNDRV_PCM_INFO_MMAP_VALID |
 		 SNDRV_PCM_INFO_INTERLEAVED |