HP Folio 13 may have a broken BIOS that doesn't set up the mute LED
GPIO properly, and the driver guesses it wrongly, too.  Add a new
fixup entry for setting the GPIO pin statically for this laptop.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=70991
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>