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>
diff --git a/sound/pci/ctxfi/ctatc.c b/sound/pci/ctxfi/ctatc.c
index 8e40262..58b235c 100644
--- a/sound/pci/ctxfi/ctatc.c
+++ b/sound/pci/ctxfi/ctatc.c
@@ -1536,7 +1536,7 @@
 	}
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int atc_suspend(struct ct_atc *atc)
 {
 	int i;
@@ -1647,7 +1647,7 @@
 	.output_switch_put = atc_output_switch_put,
 	.mic_source_switch_get = atc_mic_source_switch_get,
 	.mic_source_switch_put = atc_mic_source_switch_put,
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 	.suspend = atc_suspend,
 	.resume = atc_resume,
 #endif