ue add IF module, calculation of system frame and ssb_index

cmake_targets/CMakeLists.txt

nfapi/open-nFAPI/nfapi/public_inc/fapi_nr_ue_interface.h

openair1/SCHED_NR_UE/fapi_nr_ue_l1.c

openair1/SCHED_NR_UE/fapi_nr_ue_l1.h

openair2/LAYER2/NR_MAC_UE/config_ue.c

openair2/LAYER2/NR_MAC_UE/defs.h

openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c

openair2/LAYER2/NR_MAC_UE/proto.h

openair2/NR_UE_PHY_INTERFACE/IF_Module.c

openair2/NR_UE_PHY_INTERFACE/IF_Module.h

openair2/NR_UE_PHY_INTERFACE/NR_IF_Module.c

openair2/NR_UE_PHY_INTERFACE/NR_IF_Module.h

openair2/RRC/NR_UE/rrc_UE.c