drm/amdgpu/vcn: update new doorbell map

New doorbell map is used for VCN 4.0.3.

Signed-off-by: James Zhu <James.Zhu@amd.com>
Acked-by: Leo Liu <leo.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>