[Header Changes]
   - Definition for retaining ABM settings during disable
   - Addition of some new AUX interface definitions
   - Addition of some outbox definitions
Signed-off-by: NAnthony Koo <Anthony.Koo@amd.com>
Acked-by: NRodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>