20.xx: state of the DSA

[Paul Spooren]

Hi all,

DSA (Distributed Switch Architecture)[0] is a main feature of 20.xx and
one of the last blockers for a branch. The goal states[1] support where
possible, not necessarily every target.

This mail thread should be used to get an overview of the missing bits.

The following targets seem use `swconfig`, should/can they be ported?
Please post states and links to work in progress migrations:

* apm821xx/nand
* ath25
* ath79
* bcm47xx
* bcm53xx
* bcm63xx
* ipq40xx
* ipq806x
* kirkwood
* lantiq/xrx200
* lantiq/xway
* lantiq/xway_legacy
* mediatek
* mpc85xx
* ramips/mt7620
* ramips/mt76x8
* ramips/rt288x
* ramips/rt305x
* ramips/rt3883

All other targets can be considered as DSA targets? If you're working or
testing around that, please comment and share the status.

LuCI support is added via a PR[2] on GitHub.

Best,
Paul

[0]: https://www.kernel.org/doc/html/latest/networking/dsa/dsa.html
[1]: https://openwrt.org/docs/guide-developer/releases/goals/20.xx
[2]: https://github.com/openwrt/luci/pull/4307