i965: Fix Smooth Point Enables.
We want to program the 3DSTATE_RASTER field to the gl_context value, not the other way around. Fixes: 13ac4655 (i965: Port Gen8+ 3DSTATE_RASTER state to genxml.) Reviewed-by:Jason Ekstrand <jason@jlekstrand.net> Reviewed-by:
Lionel Landwerlin <lionel.g.landwerlin@intel.com> (cherry picked from commit 760e0156)