Removed commented code in nr-softmodem.c

Also enabled X2 when we are not using the EPC
Added in the case statement for handling the
dl_dcch_msg from the NR UE. Also added in the
proper decoding of that dl_dcch_msg and freeing

executables/nr-uesoftmodem.h

@@ -85,5 +85,7 @@ extern void reset_opp_meas(void);
 extern void print_opp_meas(void);
 void *UE_thread(void *arg);
 void init_nr_ue_vars(PHY_VARS_NR_UE *ue, uint8_t UE_id, uint8_t abstraction_flag);
+void init_nrUE_standalone_thread(int ue_idx);
+extern void init_nrUE_single_thread_stub(int nb_inst);
 
 #endif