increase the number of iteration in initial noc palcement

vpr/src/place/initial_noc_placement.cpp

@@ -182,7 +182,7 @@ static void noc_routers_anneal(const t_noc_opts& noc_opts) {
     // the constant factor above 35000.
     // Get all the router clusters and figure out how many of them exist
     const int num_router_clusters = noc_ctx.noc_traffic_flows_storage.get_router_clusters_in_netlist().size();
-    const int N_MOVES_PER_ROUTER = 35000;
+    const int N_MOVES_PER_ROUTER = 50000;
     const int N_MOVES = num_router_clusters * N_MOVES_PER_ROUTER;
 
     const double starting_prob = 0.5;