ALSA: snd_pcm_new api cleanup

Impact: cleanup

snd_pcm_new takes a char *id argument, although it is not modifying
the string. it can therefore be declared as const char *id.

Signed-off-by: Tim Blechmann <tim@klingt.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index 40c5a6f..ee0e887 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -451,7 +451,7 @@
 
 extern const struct file_operations snd_pcm_f_ops[2];
 
-int snd_pcm_new(struct snd_card *card, char *id, int device,
+int snd_pcm_new(struct snd_card *card, const char *id, int device,
 		int playback_count, int capture_count,
 		struct snd_pcm **rpcm);
 int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count);