Merge branch 'sja1105-yaml'

Vladimir Oltean says:

====================
Convert NXP SJA1105 DSA driver to YAML

This is an attempt to convert the SJA1105 driver to the YAML schema.

The SJA1105 driver has some custom device tree properties which caused
validation problems in the previous attempt:
https://patchwork.kernel.org/project/netdevbpf/patch/20210531234735.1582031-1-olteanv@gmail.com/

So now we are removing them, hoping that this will make the conversion
easier to accept.

In order to do that, we introduce a new PHY interface type, "reverse RMII",
which is like "reverse MII" (aka MII as a PHY) but for the reduced data
width version of the protocol. This is a direct replacement for an rmii
fixed-link. Now, rmii fixed-link interfaces behave as a MAC, and rev-rmii
fixed-link interfaces behave as a PHY.
====================

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