hda-codec - Add asus model to ALC861 codec

This patch adds support for Asus laptops (for example: Asus
A6Rp-AP002).

Signed-off-by: Mariusz Domanski <mariook@wp.pl>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
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