this methods free the memory that is allocated by the functions
phy_init_RU() and phy_init_lte_eNB()

- add set_function_spec_param() which configures RU_t instance depending on its
  function(al split)
- export more functions like kill_RU_proc() so that they can be reused by
  restart functionality

modifications for TDD and IF4p5 (in particular TDD). Both in RRU and RAU components. Monolithic is unchanged.

removed "short_offset" code from normal_prefix_mod. removed static declaration in PHY_ofdm_mod which was a cause for problems when parallelizing FFTs for FEP TX.

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

not finished, UE may not work, many things bad/to fix properly

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

L1/L2 scheduling extensions for BL/CE operation, BR random-access procedure, BR PRACH detection. Still untested, but compilation succeeds. Missing elements in L2 - PUSCH programming for Msg3, Msg4 retransmission programming for BL/CE. DLSCH/ULSCH programming for UE-specific DLSCH/ULSCH for BL/CE