[NET]: Remove double dev->flags checking when calling dev_close()

The unregister_netdevice() and dev_change_net_namespace()
both check for dev->flags to be IFF_UP before calling the
dev_close(), but the dev_close() checks for IFF_UP itself,
so remove those unneeded checks.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/dev.c

@@ -3893,7 +3893,6 @@ void unregister_netdevice(struct net_device *dev)
 	BUG_ON(dev->reg_state != NETREG_REGISTERED);
 
 	/* If device is running, close it first. */
-	if (dev->flags & IFF_UP)
 	dev_close(dev);
 
 	/* And unlink it from device chain. */
@@ -4018,7 +4017,6 @@ int dev_change_net_namespace(struct net_device *dev, struct net *net, const char
 	 */
 
 	/* If device is running close it first. */
-	if (dev->flags & IFF_UP)
 	dev_close(dev);
 
 	/* And unlink it from device chain */