ALSA: hda - Fix possible compile warnings regarding CONFIG_PM

Replace with a proper ifdef check of CONFIG_PM_SLEEP in hda_intel.c.
But other places in HD-audio driver are still marked with CONFIG_PM,
since these can be called for power-saving even without
CONFIG_PM_SLEEP.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_intel.c

@@ -2409,11 +2409,10 @@ static void azx_power_notify(struct hda_bus *bus)
 }
 #endif /* CONFIG_SND_HDA_POWER_SAVE */
 
-#ifdef CONFIG_PM
+#if defined(CONFIG_PM_SLEEP) || defined(SUPPORT_VGA_SWITCHEROO)
 /*
  * power management
  */
-
 static int azx_suspend(struct device *dev)
 {
 	struct pci_dev *pci = to_pci_dev(dev);
@@ -2471,10 +2470,8 @@ static int azx_resume(struct device *dev)
 static SIMPLE_DEV_PM_OPS(azx_pm, azx_suspend, azx_resume);
 #define AZX_PM_OPS	&azx_pm
 #else
-#define azx_suspend(dev)
-#define azx_resume(dev)
 #define AZX_PM_OPS	NULL
-#endif /* CONFIG_PM */
+#endif /* CONFIG_PM_SLEEP || SUPPORT_VGA_SWITCHEROO */
 
 
 /*