net/ieee802154/6lowpan.c: Remove unecessary semicolon

Found by http://coccinelle.lip6.fr/

Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c
index d529111..6d42c17 100644
--- a/net/ieee802154/6lowpan.c
+++ b/net/ieee802154/6lowpan.c
@@ -1256,7 +1256,7 @@
 		}
 
 		unregister_netdevice_many(&del_list);
-	};
+	}
 
 out:
 	return NOTIFY_DONE;