Merge branch 'net-act_police-offload-support'

Jakub Kicinski says:

===================
net: act_police offload support

this set starts by converting cls_matchall to the new flow offload
infrastructure. It so happens that all drivers implementing cls_matchall
offload today also offload cls_flower, so its a little easier for
them to handle the actions in unified flow_rule format, even though
in cls_matchall there is no flow to speak of. If a driver ever appears
which would prefer the old, direct access to TC exts, we can add the
pointer in the offload structure back and support both.

Next the act_police is added to actions supported by flow offload API.

NFP support for act_police offload is added as the final step.  The flower
firmware is configured to perform TX rate limiting in a way which matches
act_police's behaviour.  It does not use DMA.IN back pressure, and
instead	drops packets after they had been already DMAed into the NIC.
IOW it uses our standard traffic policing implementation, future patches
will extend it to other ports and traffic directions.
===================

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