ALSA: hda/realtek - Add support headphone Mic for ALC221 of HP platform

ALC221 HP platform need to support Headphone Mic.
This patch will turn on headphone Mic supported.

Signed-off-by: Kailang Yang <kailang@realtek.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>