ALSA: hda - Clean up CONFIG_SND_HDA_POWER_SAVE

CONFIG_SND_HDA_POWER_SAVE is no longer an experimental feature and its
behavior can be well controlled via the default value and module
parameter.  Let's just replace it with the standard CONFIG_PM.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/hda_trace.h b/sound/pci/hda/hda_trace.h
index d42fe91..3a1c631 100644
--- a/sound/pci/hda/hda_trace.h
+++ b/sound/pci/hda/hda_trace.h
@@ -58,7 +58,7 @@
 	TP_printk("[%d]", __entry->card)
 );
 
-#ifdef CONFIG_SND_HDA_POWER_SAVE
+#ifdef CONFIG_PM
 DECLARE_EVENT_CLASS(hda_power,
 
 	TP_PROTO(struct hda_codec *codec),
@@ -111,7 +111,7 @@
 		  __entry->card, __entry->addr, __entry->power_count,
 		  __entry->power_on, __entry->power_transition)
 );
-#endif /* CONFIG_SND_HDA_POWER_SAVE */
+#endif /* CONFIG_PM */
 
 TRACE_EVENT(hda_unsol_event,