[ALSA] Add default values for power-saving as Kconfig options

Added CONFIG_SND_AC97_POWER_SAVE_DEFAULT and CONFIG_SND_HDA_POWER_SAVE_DEFAULT
Kconfig options as the default values for power-saving mode of AC97 and
HD-audio drivers, respectively.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
diff --git a/sound/pci/ac97/ac97_codec.c b/sound/pci/ac97/ac97_codec.c
index 3e5ff29..0906f17 100644
--- a/sound/pci/ac97/ac97_codec.c
+++ b/sound/pci/ac97/ac97_codec.c
@@ -49,7 +49,7 @@
 MODULE_PARM_DESC(enable_loopback, "Enable AC97 ADC/DAC Loopback Control");
 
 #ifdef CONFIG_SND_AC97_POWER_SAVE
-static int power_save;
+static int power_save = CONFIG_SND_AC97_POWER_SAVE_DEFAULT;
 module_param(power_save, bool, 0644);
 MODULE_PARM_DESC(power_save, "Enable AC97 power-saving control");
 #endif