Upcoming Dell hardware will send more keyboard events via WMI.  Add
support for them.
Signed-off-by: NMario Limonciello <mario_limonciello@dell.com>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLen Brown <len.brown@intel.com>