- the RA SFN index wasn't increased in the FDD case, therefore the PRACH
  RX was never scheduled

- temporary solution since scheduler does not support FDD
- modified is_NR_UL_slot to return always 1 when is FDD mode
- this is necessary because currently the scheduler assumes that is TDD
  and tdd_UL_DL_ConfigurationCommon is always initialied

- this return whether the transform precoder is enabled or not
- redundant configuration code has been migrated to the new function
- get_transformPrecoding is a common MAC function used already
  @ UE side, can be adopted by gNB too

- as defined by clause 12 "BWP Operation" TS 38.213
- cleaned up hardcoded usage

Improvements to decode SIB1 in 3rd party implementations and OAI UE with the same gNB configurations

- TBS calculation was done wothout considering mulilple DMRS symbols in
  a slot, which is corrected now.

- updated return function value to -1
- removed static variable for dmrs symbol selection for channel
- Updated sin cos quadrant check conditions
- removed casting from PTRS slope and related calculations

- the band is coming from the SI, therefore a function to get the band is not
  necessary
- this solves also the limitations of the get_band algorithm with the NR bands
  overlapping in the NR operating bands table (e.g. band 78 and band 48)

- adapted the get_band function: the algorithm is now taking into account
  also the UL frequency in order to fetch the proper band (this was failing
  before as some NR bands have the same DL band, e.g. band 65 and 66)
- added new bands to the NR table as per TS 38.101 V16.4.0 (2020)
- made the from_nrarfcn function compatible with UL FDD (this function,
  used for both DL and UL  was previously working with TDD only as it
  did not compute properly the frequency for the UL FDD, throwing asserts)
- introduced common functions to get the NR table idx and the duplex mode,
  removing repeated code in the process
- removed the unused function to get the uldl offset
- improved some logging
- other minor fixes to the relevant code

- Based upon ptrs bitmap, ptrs symbols are added in DL
- Mac ptrs validation condition is updated

- Get RRC values from dedicated bandwidth part and process it
- Validate all settings in MAC layer and enable PTRS processing in PHY