net/route: export symbol ip_tos2prio

Need to export this to enable drivers use rt_tos2priority()
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/route.c

@@ -230,7 +230,7 @@ const __u8 ip_tos2prio[16] = {
 	TC_PRIO_INTERACTIVE_BULK,
 	ECN_OR_COST(INTERACTIVE_BULK)
 };
-
+EXPORT_SYMBOL(ip_tos2prio);
 
 /*
  * Route cache.