[ALSA] HDA: Add support for Gateway NX860

This patch adds support for the Gateway NX860 system.

Signed-off-by: Tobin Davis <tdavis@dsl-only.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt
index 57b878c..355ff0a 100644
--- a/Documentation/sound/alsa/ALSA-Configuration.txt
+++ b/Documentation/sound/alsa/ALSA-Configuration.txt
@@ -917,6 +917,7 @@
 	  ref		Reference board, base config
 	  m2-2		Some Gateway MX series laptops
 	  m6		Some Gateway NX series laptops
+	  pa6		Gateway NX860 series
 
 	STAC9227/9228/9229/927x
 	  ref		Reference board