[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/ens1370.c b/sound/pci/ens1370.c
index 425b167..6a0ddcf 100644
--- a/sound/pci/ens1370.c
+++ b/sound/pci/ens1370.c
@@ -798,10 +798,8 @@
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 	{
 		unsigned int what = 0;
-		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 == ensoniq->playback1_substream) {
 				what |= ES_P1_PAUSE;
 				snd_pcm_trigger_done(s, substream);
@@ -824,10 +822,8 @@
 	case SNDRV_PCM_TRIGGER_STOP:
 	{
 		unsigned int what = 0;
-		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 == ensoniq->playback1_substream) {
 				what |= ES_DAC1_EN;
 				snd_pcm_trigger_done(s, substream);