Fix up the powergating logic.
Signed-off-by: NRex Zhu <Rex.Zhu@amd.com>
Ack-by: NTom St Denis <tom.stdenis@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>