net_sched: act: clean up tca_action_flush()
net_sched: act: clean up tca_action_flush()

We could allocate tc_action on stack in tca_action_flush(),
since it is not large.

Also, we could use create_a() in tcf_action_get_1().

Cc: Jamal Hadi Salim <15cac6df0dbdaecca5b04ed6c5cc9ad59098d331@mojatatu.com>
Cc: David S. Miller <fe08d3c717adf2ae63592e4c9aec6e3e404d8e3e@davemloft.net>
Signed-off-by: Cong Wang <0f114804888b88d50037b04b42e57b858d851b87@gmail.com>
Signed-off-by: Jamal Hadi Salim <15cac6df0dbdaecca5b04ed6c5cc9ad59098d331@mojatatu.com>
Signed-off-by: David S. Miller <fe08d3c717adf2ae63592e4c9aec6e3e404d8e3e@davemloft.net>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs