Don't call calculate_preferred_dl_tda() in do-ra mode

In --do-ra mode, calculate_preferred_dl_tda() would be called without a
BWP. Then, get_searchspace() would search in the scc, leading to a
segfault. Therefore, don't call calculate_preferred_dl_tda() in do-ra
mode.

openair2/LAYER2/NR_MAC_gNB/config.c

@@ -574,7 +574,7 @@ int rrc_mac_config_req_gNB(module_id_t Mod_idP,
 
   if (CellGroup) {
 
-    if (!get_softmodem_params()->phy_test) {
+    if (!get_softmodem_params()->phy_test && !get_softmodem_params()->do_ra) {
       calculate_preferred_dl_tda(Mod_idP, NULL);
     }