Merge remote-tracking branch 'origin/256_QAM_demod' into integration_2020_wk51

executables/softmodem-common.h

openair1/PHY/CODING/nr_rate_matching.c

openair1/PHY/INIT/nr_init_ue.c

openair1/PHY/NR_UE_TRANSPORT/nr_dlsch_demodulation.c

openair1/PHY/NR_UE_TRANSPORT/nr_dlsch_llr_computation.c

openair1/PHY/NR_UE_TRANSPORT/nr_transport_proto_ue.h

openair1/PHY/defs_nr_UE.h

openair1/PHY/impl_defs_top.h

openair1/SIMULATION/NR_PHY/dlsim.c

openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_phytest.c

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_primitives.c

openair2/RRC/NR/rrc_gNB_reconfig.c