[ALSA] hda-codec - Add support for ASUS A8J modem

This patch adds support for the ASUS A8J Series 56k Modem (Motorola SM56)

Signed-off-by: Christian Rothlaender <christian@rothlaender.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>