[ALSA] HDA-Intel - Add support for MSI K9AGM2-FIH motherboard

This patch adds support for the MSI K9AGM2-FIH on-board audio.

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>