[ALSA] snd_hda_intel 3stack mode for ASUS P5P-L2

I have ASUS P5PL2 motherboard and it's embedded sound card requires
the following patch which sets '3stack' model to operate properly:
00:1b.0 0403: 8086:27d8 (rev 01)
        Subsystem: 1043:817f
        Flags: bus master, fast devsel, latency 0, IRQ 177
        Memory at dfdf8000 (64-bit, non-prefetchable) [size=16K]
        Capabilities: [50] Power Management version 2
        Capabilities: [60] Message Signalled Interrupts: 64bit+
Queue=0/0 Enable-
        Capabilities: [70] Express Unknown type IRQ 0

Signed-off-by: Nickolay V. Shmyrev <nshmyrev@yandex.ru>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>