Read the MAC address either from EEPROM or sensor ID (preferring EEPROM).

This commit can be omitted when merging back to master, but not all the following commits.

Initialize IPv4 after posix network startup.

Makefile: added Etherbone enable/disable switch, fixed --gc-sections linker arg (saves 6 kB of code)

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

Conflicts:
	tests/measure_t24p.c

wrc_ptp.c: enable PPS output after successful mode setting in Master/Gm mode, added wrc_ptp_get_mode()