ALSA: sparc: constify snd_pcm_ops structures

snd_pcm_ops are not supposed to change at runtime. All functions
working with snd_pcm_ops provided by <sound/pcm.h> work with
const snd_pcm_ops. So mark the non-const structs as const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/sparc/amd7930.c b/sound/sparc/amd7930.c
index a6864fd..56f1741 100644
--- a/sound/sparc/amd7930.c
+++ b/sound/sparc/amd7930.c
@@ -733,7 +733,7 @@
 	return snd_pcm_lib_free_pages(substream);
 }
 
-static struct snd_pcm_ops snd_amd7930_playback_ops = {
+static const struct snd_pcm_ops snd_amd7930_playback_ops = {
 	.open		=	snd_amd7930_playback_open,
 	.close		=	snd_amd7930_playback_close,
 	.ioctl		=	snd_pcm_lib_ioctl,
@@ -744,7 +744,7 @@
 	.pointer	=	snd_amd7930_playback_pointer,
 };
 
-static struct snd_pcm_ops snd_amd7930_capture_ops = {
+static const struct snd_pcm_ops snd_amd7930_capture_ops = {
 	.open		=	snd_amd7930_capture_open,
 	.close		=	snd_amd7930_capture_close,
 	.ioctl		=	snd_pcm_lib_ioctl,