fix issue when cell search doesn't set rx frequency because phy init takes too long

See commit f3c04949b7 for reference and a more
detailed description.

srsue/src/phy/phch_recv.cc

@@ -280,10 +280,8 @@ void phch_recv::cell_search_inc()
       rrc->earfcn_end();
     } else {
       Info("SYNC:  Cell Search idx %d/%d\n", cur_earfcn_index, earfcn.size());
-      if (current_earfcn != earfcn[cur_earfcn_index]) {
+      current_earfcn = earfcn[cur_earfcn_index];
-        current_earfcn = earfcn[cur_earfcn_index];
+      set_frequency();
-        set_frequency();
-      }
       phy_state = CELL_SEARCH;
     }
   }