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/ad1889.c b/sound/pci/ad1889.c
index 8c36990..0bf2c04 100644
--- a/sound/pci/ad1889.c
+++ b/sound/pci/ad1889.c
@@ -283,7 +283,7 @@ snd_ad1889_hw_free(struct snd_pcm_substream *substream)
 	return snd_pcm_lib_free_pages(substream);
 }
 
-static struct snd_pcm_hardware snd_ad1889_playback_hw = {
+static const struct snd_pcm_hardware snd_ad1889_playback_hw = {
 	.info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 		SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BLOCK_TRANSFER,
 	.formats = SNDRV_PCM_FMTBIT_S16_LE,
@@ -300,7 +300,7 @@ static struct snd_pcm_hardware snd_ad1889_playback_hw = {
 	/*.fifo_size = 0,*/
 };
 
-static struct snd_pcm_hardware snd_ad1889_capture_hw = {
+static const struct snd_pcm_hardware snd_ad1889_capture_hw = {
 	.info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 		SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BLOCK_TRANSFER,
 	.formats = SNDRV_PCM_FMTBIT_S16_LE,