Add an option to specify the AC'97 codec instead of
probing.  This is a fix for bugzilla #7467.
Signed-off-by: NDan Carpenter <error27@gmail.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@suse.cz>