Done as a part of work to move hal to shm in wrs.

Done in this commit:
--use wrpc_get_port_state instead of halexp_get_port_state
--make wrpc_get_port_state fill hal_port_state structure in the way how HAL
  fills shmem.
--update lib/net.c to use struct hal_port_state instead of hexp_port_state_t
--update monitor/monitor_ppsi.c to use struct hal_port_state instead of
  hexp_port_state_t
--update ppsi to get needed changes
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>