st/nine: Enable D3DPMISCCAPS_PERSTAGECONSTANT
st/nine: Enable D3DPMISCCAPS_PERSTAGECONSTANT

Nine already supports the feature.
There are no failing WINE tests for per stage constants.
Enabling D3DPMISCCAPS_PERSTAGECONSTANT as it fixes
https://github.com/iXit/Mesa-3D/issues/205

Signed-off-by: Patrick Rudolph <2af63f351b8bda7baf3a287b873bcd3ca66a59bb@das-labor.org>
Reviewed-by: Axel Davy <2b6ef604b998fb81662f85c329e4fc020eae8e5d@ens.fr>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler