ALSA: PCI: Replace CONFIG_PM with CONFIG_PM_SLEEP

Otherwise we may get compile warnings due to unused functions.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/cs5535audio/cs5535audio.c

@@ -399,7 +399,7 @@ static struct pci_driver cs5535audio_driver = {
 	.id_table = snd_cs5535audio_ids,
 	.probe = snd_cs5535audio_probe,
 	.remove = __devexit_p(snd_cs5535audio_remove),
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 	.driver = {
 		.pm = &snd_cs5535audio_pm,
 	},