Thomas Graf points out that I broke net/sched/ipt.c when I removed
__ipt_find_target_lock.  In fact, those routines don't need to keep
the lock held, so we can simplify them, and expose an interface
(ipt_find_target) which does module loading correctly for
net/sched/ipt.c.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>