drm/amdgpu: comments out vcn/jpeg ip blocks for aldebaran

vcn fw front door loading is not functional. comments
out vcn/jpeg ip blocks so people can load amdgpu driver
without specify ip_mask module parameter.

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Kevin Wang <kevin1.wang@amd.com>
Reviewed-by: James Zhu <James.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>