Merge branch 'lag-offload-for-ocelot-dsa-switches'

Vladimir Oltean says:

====================
LAG offload for Ocelot DSA switches

This patch series reworks the ocelot switchdev driver such that it could
share the same implementation for LAG offload as the felix DSA driver.

Testing has been done in the following topology:

         +----------------------------------+
         | Board 1         br0              |
         |             +---------+          |
         |            /           \         |
         |            |           |         |
         |            |         bond0       |
         |            |        +-----+      |
         |            |       /       \     |
         |  eno0     swp0    swp1    swp2   |
         +---|--------|-------|-------|-----+
             |        |       |       |
             +--------+       |       |
               Cable          |       |
                         Cable|       |Cable
               Cable          |       |
             +--------+       |       |
             |        |       |       |
         +---|--------|-------|-------|-----+
         |  eno0     swp0    swp1    swp2   |
         |            |       \       /     |
         |            |        +-----+      |
         |            |         bond0       |
         |            |           |         |
         |            \           /         |
         |             +---------+          |
         | Board 2         br0              |
         +----------------------------------+

The same script can be run on both Board 1 and Board 2 to set this up:

ip link del bond0
ip link add bond0 type bond mode balance-xor miimon 1
OR
ip link add bond0 type bond mode 802.3ad
ip link set swp1 down && ip link set swp1 master bond0 && ip link set swp1 up
ip link set swp2 down && ip link set swp2 master bond0 && ip link set swp2 up
ip link del br0
ip link add br0 type bridge
ip link set bond0 master br0
ip link set swp0 master br0

Then traffic can be tested between eno0 of Board 1 and eno0 of Board 2.
====================

Link: https://lore.kernel.org/r/20210205220221.255646-1-olteanv@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>