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Testing works up to the reception of SIB1/2/3 from the UE through nfapi, but there is an issue with missing some of the nfapi messages for some frames.

Necessary modifications to support noS1 with nfapi and eNB side for testing vnf-pnf up to the stage of previous commit

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

Merge from RU-RAU-split and fix of frame/subframe handling.  Was very confused with the counter in the main loop, the incrementing from the USRP read library and the nFAPI frame handling.  RACH seen on wireshark and something happens on VNF

switching some LOG_I to LOG_D, fixes for RRU IF4p5. It was broken after changes in configuration procedures. Some configuration file changes.

Network search working again.  Now calling generate_dci_top every subframe, using dummy subframe if no data to transmit. MIB and SIB2/3 coming out.  UE sees cell

this and some cleanup, duplicate defs in .h file

lte-softmodem -O <config file> will trigger legacy config mode
ltesoftmodem  -O libconfig:<config file> will trigger configuration module usage.

How to use:

1 - compilation of softmodem:
  ./build_oai --eNB -t ETHERNET

2 - compilation of mobipass driver:
  cd cmake_targets/lte_build_oai/build
  make oai_mobipass
  ln -sf liboai_mobipass.so liboai_transpro.so

3 - configuration:
  edit the configuration file, set "node_timing" to
  "synch_to_mobipass_standalone"
  that is, have the line:
    node_timing               = "synch_to_mobipass_standalone";

4 - run:
  run as usual: sudo ./lte-softmodem -C <configuration file>

added configuration file for nFAPI PNF (oaiL1) and modifications in startup procedure to initialize L1 only. When executed, it just waits for configuration, which will never come ... Provides and initial framework to integrate NFAPI PNF modules.

fixes for RRU/RAU function after changes for monolithic eNB (some things during init were broken for RRU)

Note: this commit is work in progress. Contains initial integration of NFAPI data structures which are tested for TX path. RX path to follow.