ALSA: hda/realtek - Fix HP Headset Mic can't record

This patch will fix HP workstation Headset Mic not recording.

Signed-off-by: Kailang Yang <kailang@realtek.com>
Tested-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>