[ALSA] Add PM support to SB-support code

Modules: SB drivers,SB16/AWE driver

Add PM support to SB-support code.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/isa/sb/sb_common.c b/sound/isa/sb/sb_common.c
index eb86b44..f343a82 100644
--- a/sound/isa/sb/sb_common.c
+++ b/sound/isa/sb/sb_common.c
@@ -293,6 +293,10 @@
 EXPORT_SYMBOL(snd_sbmixer_read);
 EXPORT_SYMBOL(snd_sbmixer_new);
 EXPORT_SYMBOL(snd_sbmixer_add_ctl);
+#ifdef CONFIG_PM
+EXPORT_SYMBOL(snd_sbmixer_suspend);
+EXPORT_SYMBOL(snd_sbmixer_resume);
+#endif
 
 /*
  *  INIT part