6lowpan: Remove __init tag from lowpan_netlink_fini().

It's called from both __init and __exit code, so neither
tag is appropriate.
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ieee802154/6lowpan.c

@@ -1267,7 +1267,7 @@ static inline int __init lowpan_netlink_init(void)
 	return rtnl_link_register(&lowpan_link_ops);
 }
 
-static inline void __init lowpan_netlink_fini(void)
+static inline void lowpan_netlink_fini(void)
 {
 	rtnl_link_unregister(&lowpan_link_ops);
 }