The USB report descriptor sent by the Maltron L90 keyboard is invalid,
causing the media key reports not to be accepted.

This patch adds a driver which uses a report fixup to replace the
descriptor.
Signed-off-by: NWilliam Whistler <wtbw@wtbw.co.uk>
Signed-off-by: NBenjamin Tissoires <benjamin.tissoires@redhat.com>