Merge branch 'ovs-sample-action-optimization'

Andy Zhou says:

====================
net-next sample action optimization v4

The sample action can be used for translating Openflow 'clone' action.
However its implementation has not been sufficiently optimized for this
use case. This series attempts to close the gap.

Patch 3 commit message has more details on the specific optimizations
implemented.

---
v3->v4: Enhance patch 4.
        Fix two bugs pointed out by Pravin,
        Remove 'is_sample' variable.

v2->v3: Enhance patch 4, Rafctor to move more common logic to clone_execute().

v1->v2: Address Pravin's comment, Refactor recirc and sample
        to share more common code
====================

Signed-off-by: David S. Miller <davem@davemloft.net>