[ALSA] hda-codec - model for cx20549 to support laptop HP530

Currently the model laptop-hpsense use the 0x12 as ExtMic,
and use 0x14 as Internal IntMic.
But the hp530 only have one ExtMic, the Pin widget is 0x14.

In this patch, I changed the mixer item for them.
I still reserved the IntMic item, it will be helpful if
other machine may use this model.

ALSA bug#3821.

Signed-off-by: Jiang zhe <zhe.jiang@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>