inet: Move VRF table lookup to inlined function

Table lookup compiles out when VRF is not enabled.

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index c8b8558..675e88c 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -450,15 +450,7 @@
 			goto out;
 	}
 
-	if (sk->sk_bound_dev_if) {
-		struct net_device *dev;
-
-		rcu_read_lock();
-		dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
-		if (dev)
-			tb_id = vrf_dev_table_rcu(dev) ? : tb_id;
-		rcu_read_unlock();
-	}
+	tb_id = vrf_dev_table_ifindex(net, sk->sk_bound_dev_if) ? : tb_id;
 	chk_addr_ret = inet_addr_type_table(net, addr->sin_addr.s_addr, tb_id);
 
 	/* Not specified by any standard per-se, however it breaks too