This ensures the tcf_exts_init() is called for all cases.

Fixes: 952313bd ("net: sched: cls_cgroup use RCU")
Signed-off-by: NJohn Fastabend <john.r.fastabend@intel.com>
Acked-by: NCong Wang <cwang@twopensource.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>