drm/amd: Update atomfirmware: add new retimer definition

Add some new retimer definitions and also fix a incorrect definition

Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Reviewed-by: Michael Strauss <michael.strauss@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>