_QXX numbers are determined experimentally, hotkey scancodes from thinkpad-acpi module. Change-Id: I1f7548ef62529ae25dcdcbed0fc74390b7529a2e Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com> Reviewed-on: http://review.coreboot.org/6765 Tested-by: build bot (Jenkins) Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>