ALSA: hda - Make CONFIG_SND_HDA_POWER_SAVE depending on CONFIG_PM

It makes little sense to enable power-saving without PM.
This removes SND_HDA_NEEDS_RESUME define so that we can use CONFIG_PM
in all places.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/Kconfig b/sound/pci/hda/Kconfig
index 7489b46..bb7e102d6 100644
--- a/sound/pci/hda/Kconfig
+++ b/sound/pci/hda/Kconfig
@@ -243,6 +243,7 @@
 
 config SND_HDA_POWER_SAVE
 	bool "Aggressive power-saving on HD-audio"
+	depends on PM
 	help
 	  Say Y here to enable more aggressive power-saving mode on
 	  HD-audio driver.  The power-saving timeout can be configured