drm/amdgpu: Add VCN logical to physical id mapping

Add mappings for logical to physical id for VCN/JPEG 4.0.3

v2: make local function static (Alex)

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