drm/amdgpu/atom: add support for new UNIPHYTransmitterContol cmd table

New uniphy transmitter setup table for elm/baf.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>