If an external module sends packets from the WR fabric and requests
    a Tx Ts, the TS were not going to the external IF but to the minic
    as this packets were sent from the LM32, as a result, the wrpc-sw/ppsi
    was getting confuse with the PTP TS and ext TS and losing the node
    synchronization. That was because the TS strobe line was only connected to
    the minic for every source of TS. This commit mux the stb line depending on
    the frame_id. For packets sent from LM32 (wrpc-sw) the id is 0x0, packets sent
    from an external module should use whatever id, but never 0x0.