ALSA: HDA: Quirk for Dell Vostro 320 to make microphone work

BugLink: http://launchpad.net/497546



Confirmed that the ideapad model works better than the current
quirk for Dell Vostro 320.

Cc: stable@kernel.org (2.6.35+)
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>