Revert "dev: set iflink to 0 for virtual interfaces"

This reverts commit e1622baf54df8cc958bf29d71de5ad545ea7d93c.

The side effect of this commit is to add a '@NONE' after each virtual
interface name with a 'ip link'. It may break existing scripts.

Reported-by: Olivier Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Tested-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/dev.c b/net/core/dev.c
index 0ad6262..1e57efd 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -677,10 +677,6 @@
 	if (dev->netdev_ops && dev->netdev_ops->ndo_get_iflink)
 		return dev->netdev_ops->ndo_get_iflink(dev);
 
-	/* If dev->rtnl_link_ops is set, it's a virtual interface. */
-	if (dev->rtnl_link_ops)
-		return 0;
-
 	return dev->ifindex;
 }
 EXPORT_SYMBOL(dev_get_iflink);