ALSA: hda - Add mute LED support to Lenovo Ideapad

Lenovo Ideapad with ALC272 has a mute LED that is controlled via
GPIO1.  Add a simple vmaster hook for it.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=16373


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