[ALSA] hda-codec - Add Conexant 5051 codec support

Added the support for Conexant 5051 audio codec.
Right now there are two preset models, laptop and hp.
The whole patch is based on the information from the base patch by
Linuxant.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt
index 67256bd..73f5012 100644
--- a/Documentation/sound/alsa/ALSA-Configuration.txt
+++ b/Documentation/sound/alsa/ALSA-Configuration.txt
@@ -961,6 +961,10 @@
 			can be adjusted.  Appearing only when compiled with
 			$CONFIG_SND_DEBUG=y
 
+	Conexant 5051
+	  laptop	Basic Laptop config (default)
+	  hp		HP Spartan laptop
+
 	STAC9200
 	  ref		Reference board
 	  dell-d21	Dell (unknown)