[ALSA] Add snd_pcm_group_for_each_entry() for code cleanup

Added a new macro snd_pcm_group_for_each_entry() just for code cleanup.
Old macros, snd_pcm_group_for_each() and snd_pcm_group_substream_entry(),
are removed.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
diff --git a/sound/pci/ice1712/ice1712.c b/sound/pci/ice1712/ice1712.c
index 830a1bb..e880469 100644
--- a/sound/pci/ice1712/ice1712.c
+++ b/sound/pci/ice1712/ice1712.c
@@ -977,11 +977,9 @@
 	{
 		unsigned int what = 0;
 		unsigned int old;
-		struct list_head *pos;
 		struct snd_pcm_substream *s;
 
-		snd_pcm_group_for_each(pos, substream) {
-			s = snd_pcm_group_substream_entry(pos);
+		snd_pcm_group_for_each_entry(s, substream) {
 			if (s == ice->playback_pro_substream) {
 				what |= ICE1712_PLAYBACK_START;
 				snd_pcm_trigger_done(s, substream);