Change +4 for tx to a variable and get it to run at +2, this alllows nFAPI to get the reply back for HI_DCI0 to generate the PHICH in time

Crashes around msg4 time, but understand that need to get the ACK for the UE UL of msg3 back to UE within 4ms

Over write Raymond's copy of the open nfapi diff with the one that I am using - it re-orders the processing of dl_config and tx_req