upon starting the RRC Security Mode command. This allows the gNB to
pass this message only after the SM procedure is complete.
Also made sure that the RRC notifies the NGAP upon the end of the
reconfiguration procedure, to make sure that the NGAP sends the UE
context setup response.
since absolute freq point a members have been removed from the srslte_nr_carrier_t
struct (they are now actual frequencies) the abs_point_a values are now in
the RRC cell structs