ALSA: HDA: Pin fixup for Zotac Z68 motherboard

Pin 0x1b was connected to the front panel connector, which according to
the HDA standard should contain a mic and a headphone. In this case,
the headphone was listed as "line out" by BIOS.

Cc: stable@kernel.org
BugLink: https://bugs.launchpad.net/bugs/993162


Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>