[ALSA] [Trivial] Fix ac97_quirk option in document

Modules: Documentation

Fix a wrong option value for ac97_quirk option in the document.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

Documentation/sound/alsa/ALSA-Configuration.txt

diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt
index 23d1870..84068ba 100644
--- a/Documentation/sound/alsa/ALSA-Configuration.txt
+++ b/Documentation/sound/alsa/ALSA-Configuration.txt
@@ -1481,7 +1481,7 @@
 
 The following strings are accepted:
     - default	Don't override the default setting
-    - disable	Disable the quirk
+    - none	Disable the quirk
     - hp_only	Bind Master and Headphone controls as a single control
     - swap_hp	Swap headphone and master controls
     - swap_surround  Swap master and surround controls