drm/amdgpu: enable VCN cg and JPEG cg/pg

Not enable VCN pg because encode issue

Signed-off-by: Sonny Jiang <sonny.jiang@amd.com>
Reviewed-by: James Zhu <James.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>