[Etherboot-developers] patch for 3c90x.c

[<ke...@us...>]

Apparently some 905s have their MAC address starting at offset 0x10 only
in the EEPROM, while some have them at both 0 and 0x10. So Etherboot
will not work on the former. The Linux driver always uses the one at
0x10, so we do the same. Michael Rendell sent in this fix. It's in CVS
now.