If multiple threads try to read IOHIDElements and IOHIDValues from
the same IOHIDDevice simultaneously, we sometimes crash deep in
IOKit.

Fixes a crash in GTA 4 when using a PS4 controller.
Signed-off-by: Tim Clem <tclem@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>