st/nine: correctly advertise D3DPMISCCAPS_CLIPTLVERTS

The cap means D3DFVF_XYZRHW vertices will see clipping.
This is not the case when
PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION is supported, since
it'll disable clipping.

Signed-off-by: Axel Davy <axel.davy@ens.fr>