st/nine: Ignore multisample quality level if no ms

Apparently instead of returning error when passing
a quality level different than 0 for
D3DMULTISAMPLE_NONE, we should pass.

Fixes: https://github.com/iXit/Mesa-3D/issues/340



Cc: mesa-stable@lists.freedesktop.org

Signed-off-by: Axel Davy <davyaxel0@gmail.com>
(cherry picked from commit 1d363d44)