LSA: hda - Add HP Acacia detection

Add automatic mapping of HP Acacia motherboards to 3stack-hp.  Allows
for greater then 2 channel audio by enabling Channel Mode option in mixer.

Motherboard specs:
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01321559&lc=en&dlc=en&cc=us&product=3829353&os=2093&lang=en#

Signed-off-by: Chris Bagwell <chris at cnpbagwell dot com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>