We have several Dell laptops which use the codec alc236, the headset
mic can't work on these machines. Following the commit 736f20a7, we
add the pin cfg table to make the headset mic work.

Cc: <stable@vger.kernel.org>
Signed-off-by: NHui Wang <hui.wang@canonical.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>