drm/amdgpu: enable dpg for vcn and jpeg on GC 11_5_2

DPG mode is enabled for vcn and jpeg on VCN v4_0_5

Signed-off-by: Saleemkhan Jamadar <saleemkhan.jamadar@amd.com>
Reviewed-by: Tim Huang <tim.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>