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>

sound/mips/hal2.c

@@ -496,7 +496,7 @@ static void hal2_free_dmabuf(struct hal2_codec *codec)
 		       DMA_ATTR_NON_CONSISTENT);
 }
 
-static struct snd_pcm_hardware hal2_pcm_hw = {
+static const struct snd_pcm_hardware hal2_pcm_hw = {
 	.info = (SNDRV_PCM_INFO_MMAP |
 		 SNDRV_PCM_INFO_MMAP_VALID |
 		 SNDRV_PCM_INFO_INTERLEAVED |