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/als4000.c b/sound/pci/als4000.c
index 0eeca49..feb2a14 100644
--- a/sound/pci/als4000.c
+++ b/sound/pci/als4000.c
@@ -987,7 +987,7 @@
 	pci_set_drvdata(pci, NULL);
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int snd_als4000_suspend(struct device *dev)
 {
 	struct pci_dev *pci = to_pci_dev(dev);
@@ -1040,7 +1040,7 @@
 #define SND_ALS4000_PM_OPS	&snd_als4000_pm
 #else
 #define SND_ALS4000_PM_OPS	NULL
-#endif /* CONFIG_PM */
+#endif /* CONFIG_PM_SLEEP */
 
 static struct pci_driver als4000_driver = {
 	.name = KBUILD_MODNAME,