[NETNS]: Enable inetdev_event notifier.

After all these preparations it is time to enable main IPv4 device
initialization routine inside namespace. It is safe do this now.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index 87490f7..90210a7 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -1045,9 +1045,6 @@
 	struct net_device *dev = ptr;
 	struct in_device *in_dev = __in_dev_get_rtnl(dev);
 
-	if (dev->nd_net != &init_net)
-		return NOTIFY_DONE;
-
 	ASSERT_RTNL();
 
 	if (!in_dev) {