ALSA: hda/realtek - Introduce polarity for micmute LED GPIO

Currently mute LED and micmute LED share the same GPIO polarity.

So split the polarity for mute and micmute, in case they have different
polarities.

Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Link: https://lore.kernel.org/r/20200430083255.5093-1-kai.heng.feng@canonical.com


Signed-off-by: Takashi Iwai <tiwai@suse.de>