[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/ca0106/ca0106_main.c b/sound/pci/ca0106/ca0106_main.c
index ea6712b..48f3f17 100644
--- a/sound/pci/ca0106/ca0106_main.c
+++ b/sound/pci/ca0106/ca0106_main.c
@@ -775,7 +775,6 @@
 	struct snd_ca0106_pcm *epcm;
 	int channel;
 	int result = 0;
-	struct list_head *pos;
         struct snd_pcm_substream *s;
 	u32 basic = 0;
 	u32 extended = 0;
@@ -790,8 +789,7 @@
 		running=0;
 		break;
 	}
-        snd_pcm_group_for_each(pos, substream) {
-                s = snd_pcm_group_substream_entry(pos);
+        snd_pcm_group_for_each_entry(s, substream) {
 		runtime = s->runtime;
 		epcm = runtime->private_data;
 		channel = epcm->channel_id;