- regardless whether LPDC is supported or not, some calibration
  flags need to be set, more over some of them have tx in name,
  so setting them in hal_port_rx_setup_state_fsm() is messy. So..
- set any LPDC-irrelevant flags in the port_fsm when link_up
- make sure the value of bitslide is cleared when link_down
- measure bitslide only in NO_LPDC state, otherwise leave it zero