modified tx_mac to run with minimum ifg
improved cross clock communication. modified instrumentation with chipscope
Merge branch 'tx_rx' of https://github.com/myworkbench/InHouse-RDMA into linux_driver-tx_rx
nf10-newnic: some scripts for tx-only testing

100_pkts-iperf generates a SW/HW synchronization bug, but
not in a deterministical way.