[ALSA] Add model entry for Clevo m665n laptop

Added the proper model entry for Clevo m665n laptop with ALC880 codec.
Also, added a model string 'clevo' to enable the clevo-type model option.

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 f61af23..74ea66d3 100644
--- a/Documentation/sound/alsa/ALSA-Configuration.txt
+++ b/Documentation/sound/alsa/ALSA-Configuration.txt
@@ -783,6 +783,7 @@
 	  F1734		2-jack
 	  lg		LG laptop (m1 express dual)
 	  lg-lw		LG LW20 laptop
+	  clevo		Clevo laptops (m520G, m665n)
 	  test		for testing/debugging purpose, almost all controls can be
 			adjusted.  Appearing only when compiled with
 			$CONFIG_SND_DEBUG=y