ALSA: hda - Add quirk for Gateway %1616 laptop

Gateway T1616 laptop needs EAPD always on while the current STAC9205
code turns off per HP plug.  Added a new model "eapd" to keep it on.

Reference: Novell bnc#467597
	https://bugzilla.novell.com/show_bug.cgi?id=467597

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/Documentation/sound/alsa/HD-Audio-Models.txt b/Documentation/sound/alsa/HD-Audio-Models.txt
index 75914bc..ef6b22e 100644
--- a/Documentation/sound/alsa/HD-Audio-Models.txt
+++ b/Documentation/sound/alsa/HD-Audio-Models.txt
@@ -285,6 +285,7 @@
   dell-m42	Dell (unknown)
   dell-m43	Dell Precision
   dell-m44	Dell Inspiron
+  eapd		Keep EAPD on (e.g. Gateway T1616)
 
 STAC9220/9221
 =============