This files describes the differences between vci_ethernet_tsar and
vci_ethernet

* Added f->wr_req->setPacket(0x4); for every Write command from vci_ethernet in
  order to respect overloading of vci CMD in pktid of Tsar architecture

* Added overlapping detection in read and write vci CMD. First, vci CMD is now
  made at maximum with the boundary of a cache line (64 alignement)

* Added set and reset for IRQ lines enable