Merge branch 'cls_flower-ARP'

Simon Horman says:

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net/sched: cls_flower: Support matching ARP

Add support for support matching on ARP operation, and hardware and
protocol addresses for Ethernet hardware and IPv4 protocol addresses.

Changes since RFC:
* None other than dropping RFC designation after positive feedback from Jiri
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Signed-off-by: David S. Miller <davem@davemloft.net>