Chaging NR functions to be properly named

This commit removed all the linking errors
between the NR UE and the LTE UE. This was done by
changing:
-      rrc_data_req_ue
+      rrc_data_req_nr_ue

executables/nr-softmodem.c

@@ -720,7 +720,7 @@ void init_pdcp(void) {
     pdcp_initmask = pdcp_initmask | ENB_NAS_USE_TUN_BIT | SOFTMODEM_NOKRNMOD_BIT  ;
   }
 
-  pdcp_module_init(pdcp_initmask, 0);
+  nr_pdcp_module_init(pdcp_initmask, 0);
 
   /*if (NODE_IS_CU(RC.rrc[0]->node_type)) {
     pdcp_set_rlc_data_req_func((send_rlc_data_req_func_t)proto_agent_send_rlc_data_req);