Added support for S/PDIF digital output on ASUS M2V motheboard - added
new model '3stack-660-digout' and ALC660VD_3ST_DIG
Signed-off-by: NMike Crash <mike@mikecrash.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@suse.cz>