drm/amdgpu: set the gfx config properly for all CZ variants (v2)

Need to adjust the number of CUs and RBs.

v2: get proper values

Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Samuel Li <samuel.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>