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/cs46xx/cs46xx_lib.h b/sound/pci/cs46xx/cs46xx_lib.h
index b518949..86f1462 100644
--- a/sound/pci/cs46xx/cs46xx_lib.h
+++ b/sound/pci/cs46xx/cs46xx_lib.h
@@ -90,7 +90,7 @@
 struct dsp_spos_instance *cs46xx_dsp_spos_create (struct snd_cs46xx * chip);
 void cs46xx_dsp_spos_destroy (struct snd_cs46xx * chip);
 int cs46xx_dsp_load_module (struct snd_cs46xx * chip, struct dsp_module_desc * module);
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 int cs46xx_dsp_resume(struct snd_cs46xx * chip);
 #endif
 struct dsp_symbol_entry *cs46xx_dsp_lookup_symbol (struct snd_cs46xx * chip, char * symbol_name,