net: Use helper macro RT_TOS() in __icmp_send()

Use helper macro RT_TOS() to get tos in __icmp_send().
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/icmp.c

@@ -690,7 +690,7 @@ void __icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info,
 		rcu_read_unlock();
 	}
 
-	tos = icmp_pointers[type].error ? ((iph->tos & IPTOS_TOS_MASK) |
+	tos = icmp_pointers[type].error ? (RT_TOS(iph->tos) |
 					   IPTOS_PREC_INTERNETCONTROL) :
 					   iph->tos;
 	mark = IP4_REPLY_MARK(net, skb_in->mark);