ALSA: hda - Fix headset mic detection problem for two Dell machines

ALSA: hda - Fix headset mic detection problem for two Dell machines

BugLink: https://bugs.launchpad.net/bugs/1748807
One of them has the codec of alc256 and the other one has the codec
of alc289.

Cc: <stable@vger.kernel.org>
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
(cherry picked from commit 3f2f7c553d077be6a30cb96b2976a2c940bf5335
 git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git)

Signed-off-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>