intel: change urb max shader geometry for CML GT1

intel: change urb max shader geometry for CML GT1

Below deqp cts failure is seen on CML GT1 only , GT2 all test
passes, changing the max shader geometry to 256 (previous 640)
fixes all failure tests.Similar issue on BDW GT1
https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3173

dEQP-GLES31.functional.geometry_shading.layered.
		render_with_default_layer_cubemap
		render_with_default_layer_3d
		render_with_default_layer_2d_array

Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/4102

Signed-off-by: Abhishek Kumar <abhishek4.kumar@intel.com>
Acked-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8550>