Base on PSRSU specification, every seletive update frame need to use two SDP to indicate the frame active range. So we occupy another GSP1 for PSRSU execution. Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com> Signed-off-by: Po-Ting Chen <robin.chen@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>