This patch adds support for more systems using Analog Devices codecs.
    Asus P5B-DLX - AD1988
    Toshiba U205 - AD1981
    Lenovo M55 - AD1986
    Samsung R55 - AD1986
Signed-off-by: Tobin Davis <tdavis@dsl-only.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>