wined3d: Disable only ARB_clip_control when ARB_viewport_array cannot be used for pixel center offsets.

We still may want to use ARB_viewport_array, even if only for multiple
viewports.
Signed-off-by: Józef Kucia <jkucia@codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Matteo Bruni <mbruni@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>