[ALSA] make local objects static

Memalloc module,PCM Midlevel,Timer Midlevel,GUS Library,AC97 Codec
ALI5451 driver,RME9652 driver
Make some functions/variables that are used in only one file static.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
diff --git a/sound/pci/ali5451/ali5451.c b/sound/pci/ali5451/ali5451.c
index cb12d78..ce6c9fa 100644
--- a/sound/pci/ali5451/ali5451.c
+++ b/sound/pci/ali5451/ali5451.c
@@ -1842,7 +1842,7 @@
 	return 0;
 }
 
-struct ali_pcm_description ali_pcms[] = {
+static struct ali_pcm_description ali_pcms[] = {
 	{ "ALI 5451", ALI_CHANNELS, 1, &snd_ali_playback_ops, &snd_ali_capture_ops },
 	{ "ALI 5451 modem", 1, 1, &snd_ali_modem_playback_ops, &snd_ali_modem_capture_ops }
 };