Update to support 2 mobiles. Requires an update in RLC and PDCP.

openair2/RRC/CELLULAR/rrc_rg_L2_frontend.c

openair2/RRC/CELLULAR/rrc_rg_init.c

openair2/RRC/CELLULAR/rrc_rg_msg_decode.c

openair2/RRC/CELLULAR/rrc_rg_nas_intf.c

openair2/RRC/CELLULAR/rrc_rg_outputs.c

openair2/RRC/CELLULAR/rrc_rg_process.c

openair2/RRC/CELLULAR/rrc_ue_L2_frontend.c

openair2/RRC/CELLULAR/rrc_ue_L2_interface.c

openair2/RRC/CELLULAR/rrc_ue_init.c

openair2/RRC/CELLULAR/rrc_ue_main.c

openair2/RRC/CELLULAR/rrc_ue_nas_intf.c

openair2/RRC/CELLULAR/rrc_ue_outputs.c

openair2/RRC/CELLULAR/rrc_ue_process.c