drm/amdgpu: add partition schedule for GC(9, 4, 3)

Implement partition schedule for GC(9, 4, 3).

Signed-off-by: James Zhu <James.Zhu@amd.com>
Acked-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>