[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/include/sound/pcm.h b/include/sound/pcm.h
index deff5a9..73334e0 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -603,11 +603,8 @@
 	read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \
 } while (0)
 
-#define snd_pcm_group_for_each(pos, substream) \
-	list_for_each(pos, &substream->group->substreams)
-
-#define snd_pcm_group_substream_entry(pos) \
-	list_entry(pos, struct snd_pcm_substream, link_list)
+#define snd_pcm_group_for_each_entry(s, substream) \
+	list_for_each_entry(s, &substream->group->substreams, link_list)
 
 static inline int snd_pcm_running(struct snd_pcm_substream *substream)
 {