ALSA: pci: make snd_pcm_hardware const

Make these const as they are only used during 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/pci/atiixp_modem.c b/sound/pci/atiixp_modem.c
index 52e0ea7..a586635 100644
--- a/sound/pci/atiixp_modem.c
+++ b/sound/pci/atiixp_modem.c
@@ -834,7 +834,7 @@ static int snd_atiixp_pcm_hw_free(struct snd_pcm_substream *substream)
 /*
  * pcm hardware definition, identical for all DMA types
  */
-static struct snd_pcm_hardware snd_atiixp_pcm_hw =
+static const struct snd_pcm_hardware snd_atiixp_pcm_hw =
 {
 	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 				 SNDRV_PCM_INFO_BLOCK_TRANSFER |