- Procedure get_l_prime is modified
	- Single and double symbol DMRS are handled in Type A and Type B

Procedure fill_dmrs_mask is modified.
	- PDSCH Mapping Type B is supported
	- Modified according to sections 5.1.6.2 of Spec 38.214
	- Single and double symbol DMRS are handled in Type A and Type B

Mapping type according to the time domain allocation from DCI should be used to get the values of DMRS config
For sending sib1 - DCI FORMAT 1_0 will be used with SI_RNTI, UE should perform these actions
according to sections 5.1.6.2 of Spec 38.214

Additional DMRS set to pos2 in case of msg2 reception, msg3 transmission.

Mapping type B is added to RRC reconfig.
	- nr_dlsim updated to test typeA and typeB. Verified the changes.
	- RFSIM Validation of PDSCH Mapping TypeB  by changing timedomainallocation in configuration files.

reworking of MAC functions to schedule SSBs, including VRB map occupation and get_type0_PDCCH_CSS_config_parameters

It is sufficient to pass l_d directly to the function but considering future extension to mapping type B, this way makes more sense.

- 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

- sorted out according to recurring logic that wants function
  prototypes in separate files from data struct and constants
  definitions, variables in separate .c files with inclusion
  of "extern" header files
- moved function prototypes to resective header files
- moved data structures and constants to respective header files
- merged unnecessary mac.h file into mac_defs.h @ MAC UE
- moved const variables suchs as tables to respective .c files
- moved extern references to respective extern.h files

- related to section 5 of 3GPP TS 38.321 specs
- handling of RA failure
- handling of RA completion
- first implementation of contention-based RA procedures
- minor fixes related to ue_get_rach and init_ra functions

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

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

- 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

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

Get type0_PDCCH_CSS_config parameters at the gNB. SIB1 initialization has been added at SI initialization. SIB1 was transmitted with static parameters.

MIB NR: pdcch_ConfigSIB1 selection and fill using the configuration file, and using a dynamic method.

This commit contains work done by Eurecom and by Benetel.

	ACKNOWLEDGEMENT:
 	1. This commit was developed at Vicomtech (https://www.vicomtech.org) under UE project CDN-X-ALL: "CDN edge-cloud computing for efficient cache and reliable streaming aCROSS Aggregated unicast-multicast LinkS"
 	2. Project funded by Fed4FIRE+ OC5 (https://www.fed4fire.eu)
Signed-off-by: javier.morgade@ieee.org <javier.morgade@ieee.org>