adding nr_dlsim (doing pdcch for the moment only)

See merge request oai/openairinterface5g!449

Develop nr merge2 parallel

See merge request oai/openairinterface5g!443

added optimized polar decoding to UE DCI processing. Still to be tested. Changed decoder API to return XOR(CRC,rxCRC) which can be used to check for RNTI at receiver. For PBCH it returns 0 on positive CRC, !=0 on CRC mismatch.

Merge branch 'nr-polar-encoder-optimizations' of https://gitlab.eurecom.fr/oai/openairinterface5g into nr-polar-encoder-optimizations

Conflicts:
	openair1/PHY/CODING/TESTBENCH/polartest.c
	openair1/PHY/CODING/nrPolar_tools/nr_polar_encoder.c
	openair1/PHY/CODING/nr_compute_tbs.c
	openair1/PHY/CODING/nr_segmentation.c
	openair1/PHY/INIT/nr_parms.c
	openair1/PHY/NR_TRANSPORT/nr_pbch.c

Conflicts:
	targets/RT/USER/nr-ru.c

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>

Nr ue loop memory fixes

See merge request oai/openairinterface5g!439

Conflicts:
	openair1/PHY/CODING/nrPolar_tools/nr_polar_decoder.c
	openair1/PHY/CODING/nrPolar_tools/nr_polar_encoder.c
	openair1/PHY/CODING/nr_polar_init.c

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

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