[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/ali5451/ali5451.c b/sound/pci/ali5451/ali5451.c
index ba7fa22..cd2fe37 100644
--- a/sound/pci/ali5451/ali5451.c
+++ b/sound/pci/ali5451/ali5451.c
@@ -1224,7 +1224,6 @@
 				    
 {
 	struct snd_ali *codec = snd_pcm_substream_chip(substream);
-	struct list_head *pos;
 	struct snd_pcm_substream *s;
 	unsigned int what, whati, capture_flag;
 	struct snd_ali_voice *pvoice = NULL, *evoice = NULL;
@@ -1243,8 +1242,7 @@
 	}
 
 	what = whati = capture_flag = 0;
-	snd_pcm_group_for_each(pos, substream) {
-		s = snd_pcm_group_substream_entry(pos);
+	snd_pcm_group_for_each_entry(s, substream) {
 		if ((struct snd_ali *) snd_pcm_substream_chip(s) == codec) {
 			pvoice = s->runtime->private_data;
 			evoice = pvoice->extra;