drm/amdgpu/: add clientID for 2nd vcn instance
add clientID for 2nd vcn instance, remove unused SOC15_IH_CLIENTID_SYSHUB.
Signed-off-by: James Zhu <James.Zhu@amd.com>
Reviewed-by: Leo Liu <leo.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
authored by