As reported here: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1173681
the X550CC needs wapf=4 too.
Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com> Signed-off-by: Jiri Slaby <jslaby@suse.cz>