pcilmr: Add logging functions for margining

pcilmr: Add logging functions for margining

* Implement option to turn on/off logging for margining;
* Support systems with several PCI domains;
* margin_log_margining function prints margining in progress log using
  one line messages for each Receiver in the form:
  "Margining - <direction> - Lanes [<current simultaneous lanes>] - ETA:
  <current direction-lanes margining remaining time> Steps: <current
  margining steps done> Total ETA: <utility run total remaining time>".

Reviewed-by: Sergei Miroshnichenko <s.miroshnichenko@yadro.com>
Signed-off-by: Nikita Proshkin <n.proshkin@yadro.com>