It seems that D3D12CreateDevice() is imported by ordinal on Windows.

Reported by Sveinar Søpler.
Signed-off-by: Józef Kucia <jkucia@codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>