ipmr,ip6mr: implement ndo_get_iflink

Don't use dev->iflink anymore.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index eec68b0..d2e3b3e 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -473,8 +473,14 @@
 	return NETDEV_TX_OK;
 }
 
+static int reg_vif_get_iflink(const struct net_device *dev)
+{
+	return 0;
+}
+
 static const struct net_device_ops reg_vif_netdev_ops = {
 	.ndo_start_xmit	= reg_vif_xmit,
+	.ndo_get_iflink = reg_vif_get_iflink,
 };
 
 static void reg_vif_setup(struct net_device *dev)
@@ -509,7 +515,6 @@
 		free_netdev(dev);
 		return NULL;
 	}
-	dev->iflink = 0;
 
 	rcu_read_lock();
 	in_dev = __in_dev_get_rcu(dev);