[ALSA] ac97 - Fix power_save option value as time-out

The power_save option was set as boot although it was meant to be a
timeout value like the same option of snd-hda-intel originally.
Now fixed to the same style.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

sound/pci/ac97/ac97_codec.c

@@ -49,8 +49,9 @@ MODULE_PARM_DESC(enable_loopback, "Enable AC97 ADC/DAC Loopback Control");
 
 #ifdef CONFIG_SND_AC97_POWER_SAVE
 static int power_save = CONFIG_SND_AC97_POWER_SAVE_DEFAULT;
-module_param(power_save, bool, 0644);
+module_param(power_save, int, 0644);
-MODULE_PARM_DESC(power_save, "Enable AC97 power-saving control");
+MODULE_PARM_DESC(power_save, "Automatic power-saving timeout "
+		 "(in second, 0 = disable).");
 #endif
 /*
 
@@ -2362,7 +2363,7 @@ int snd_ac97_update_power(struct snd_ac97 *ac97, int reg, int powerup)
 		 *  that open/close frequently)
 		 */
 		schedule_delayed_work(&ac97->power_work,
-				      msecs_to_jiffies(2000));
+				      msecs_to_jiffies(power_save * 1000));
 	else {
 		cancel_delayed_work(&ac97->power_work);
 		update_power_regs(ac97);