Merge branch 'mlxsw-ERP-sharing-multiple-masks'

Ido Schimmel says:

====================
mlxsw: spectrum: acl: Introduce ERP sharing by multiple masks

Jiri says:

The Spectrum-2 hardware has limitation number of ERPs per-region. In
order to accommodate more masks than number of ERPs, the hardware
supports to insert rules with delta bits. By that, the rules with masks
that differ in up-to 8 consecutive bits can share the same ERP.

Patches 1 and 2 fix couple of issues that would appear in existing
selftests after adding delta support

Patch 3 introduces a generic object aggregation library. Now it is
static, but it will get extended for recalculation of aggregations in
the future in order to reach more optimal aggregation.

Patch 4 just simply converts existing ERP code to use the objagg library
instead of a rhashtable.

Patches 5-9 do more or less small changes to prepare ground for the last
patch.

Patch 10 fills-up delta callbacks of objagg library and utilizes the
delta bits for rule insertion.

The last patch adds selftest to test the mlxsw Spectrum-2 delta flows.
====================

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

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