i965/cs: Get max_cs_threads from brw_compiler devinfo
i965/cs: Get max_cs_threads from brw_compiler devinfo

Reviewed-by: Jason Ekstrand <b186559eaedf698788888c8a2559b4efb4db10d6@intel.com>
Signed-off-by: Kristian Høgsberg Kristensen <ca9b5b1e27d4fa7f4ba6848bdd08ca52cfd6330c@bitplanet.net>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler