Revert "atm: Do not free already unregistered net device."

This reverts commit 65e4113684e50cee75357ce10dc9026b0929e4e9.

Unlike the other cases Pavel fixed, this case did not
setup a netdev->destructor of free_netdev, therefore this
change was not correct.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/atm/br2684.c b/net/atm/br2684.c
index 13858e2..9d52ebf 100644
--- a/net/atm/br2684.c
+++ b/net/atm/br2684.c
@@ -350,6 +350,7 @@
 			list_del(&brdev->br2684_devs);
 			write_unlock_irq(&devs_lock);
 			unregister_netdev(net_dev);
+			free_netdev(net_dev);
 		}
 		return;
 	}
@@ -770,6 +771,7 @@
 
 		list_del(&brdev->br2684_devs);
 		unregister_netdev(net_dev);
+		free_netdev(net_dev);
 	}
 }