ALSA: hda - Fix warnings with CONFIG_SND_POWER_SAVE=n

Use static inline for dummy function to fix the warnings like below
  sound/pci/hda/patch_sigmatel.c: In function ‘stac92xx_init’:
  sound/pci/hda/patch_sigmatel.c:4387:3: warning: statement with no effect
  sound/pci/hda/patch_sigmatel.c: In function ‘stac92xx_resume’:
  sound/pci/hda/patch_sigmatel.c:4927:3: warning: statement with no effect
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_codec.h

@@ -1011,17 +1011,15 @@ int snd_hda_suspend(struct hda_bus *bus);
 int snd_hda_resume(struct hda_bus *bus);
 #endif
 
-#ifdef CONFIG_SND_HDA_POWER_SAVE
 static inline
 int hda_call_check_power_status(struct hda_codec *codec, hda_nid_t nid)
 {
+#ifdef CONFIG_SND_HDA_POWER_SAVE
 	if (codec->patch_ops.check_power_status)
 		return codec->patch_ops.check_power_status(codec, nid);
+#endif
 	return 0;
 }
-#else	
-#define hda_call_check_power_status(codec, nid)		0
-#endif
 
 /*
  * get widget information