net: sched: act_ife: fix memory leak in ife init

Free params if tcf_idr_check_alloc() returned error.

Fixes: 0190c1d4

 ("net: sched: atomically check-allocate action")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>