[ALSA] ak4531 - Add PM support

Modules: AK4531 codec

Add PM support to AK4531 codec driver.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/include/sound/ak4531_codec.h b/include/sound/ak4531_codec.h
index 4e7c661..edf0407 100644
--- a/include/sound/ak4531_codec.h
+++ b/include/sound/ak4531_codec.h
@@ -77,4 +77,9 @@
 int snd_ak4531_mixer(struct snd_card *card, struct snd_ak4531 *_ak4531,
 		     struct snd_ak4531 **rak4531);
 
+#ifdef CONFIG_PM
+void snd_ak4531_suspend(struct snd_ak4531 *ak4531);
+void snd_ak4531_resume(struct snd_ak4531 *ak4531);
+#endif
+
 #endif /* __SOUND_AK4531_CODEC_H */