ALSA: hda - Add missing hp_pins definitions for ALC269 quirks

In 2.6.33 ACL269 unsol event handler was changed to look up the pre-defined
pins, but the headphone pins aren't defined properly in each quirk.
This patch adds the missing definitions, and fixes the speaker auto-mute
regression on some ASUS (and possibly other) laptops.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Cc: <stable@kernel.org>