Be sure to re-enable GPIO lines on resume.  Users still have to
be sure to set them properly.
Signed-off-by: NJonathan Corbet <corbet@lwn.net>
Signed-off-by: NDaniel Drake <dsd@laptop.org>
Signed-off-by: NFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>