- IP data were fetched and passed to MAC directly at the PHY layer
- random data was generated whenever there's no upcoming data.
- Therefore these functionalities are now moved to MAC and FAPI interfaces
- are used instead.

- ceiling computation num of segments (cod/dec)
- fixes demodulation
- initialisation CW for PDSCH RA
- memcpy dl_ch_estimates to pdsch_vars_ra (hotfix)
- correct N_RB for DCI 1_0 and RNTI_RA

- LDPC decoder does not support lower MCS, therefore MCS 9 has been selected
  for the Msg2 configuration.
- This is done only in do-ra mode, in order to prevent any fallout on the
  current the configuration used for the operation with the commercial UE

Develop integration 2020 week 26

See merge request oai/openairinterface5g!841

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Merge remote-tracking branch 'origin/NR_RRC_X2AP_RemoveHardcodings_GlobalEdge' into develop_integration_2020_w26

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Conflicts:
	openair2/LAYER2/NR_MAC_gNB/gNB_scheduler.c

Develop integration 2020 week 25

The following Merge Requests have been included:

* MR 799 : NR RRC PRACH procedures
* MR 831 : NR PUCCH2 polar implementation
* MR 832 : coarse scope cleanup
* MR 835 : fix NR UE transport on PBCH
* MR 836 : NR fix phytest packet corruption DLSCH

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Merge remote-tracking branch 'origin/nr_fix_phytest_packet_corruption_dlsch' into develop_integration_2020_w25

- Payload was filled with zeros instead of random bytes