sched: Fix accidental removal of errout goto

Bring back the goto that was removed by accident.
Reported-by: NColin Ian King <colin.king@canonical.com>
Fixes: 40c81b25 ("sched: check negative err value to safe one level of indent")
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/sched/cls_api.c

@@ -389,6 +389,7 @@ static int tc_ctl_tfilter(struct sk_buff *skb, struct nlmsghdr *n)
 				       RTM_DELTFILTER, false);
 			if (tcf_proto_destroy(tp, false))
 				RCU_INIT_POINTER(*back, next);
+			goto errout;
 		case RTM_GETTFILTER:
 			err = tfilter_notify(net, skb, n, tp, fh,
 					     RTM_NEWTFILTER, true);