GPIO_MASK was introduced in commit "df694daa [ALSA] hda-codec - Add
the support of ALC262,ALC883,ALC885,ALC861" but it's not being used. So
we can simply remove it.
Signed-off-by: NKai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>