As part of the fix, make the IP address private to the ipv4.c

Update Etherbone config space with correct IP address.

wrc_main starts bootp whenever link goes up
Rever Arria2 sys clock to 125MHz -- we had packet loss at 62.5MHz
Added IP training support to the shell
Have the shell reset the packet filter when the MAC is changed

Tidy up printing at startup

Wesley W. Terpstra authored 13 years ago and Tomasz Wlostowski committed 12 years ago

Hook a new socket to tap ARP messages
Process ARP messages into replies

rewrote pps_gen driver (to match the libswitchhw one), removed remaining references to UTC timescale