Merge branch 'dsa-en7581' into main

Lorenzo Bianconi says:

====================
Add second QDMA support for EN7581 eth controller

EN7581 SoC supports two independent QDMA controllers to connect the
Ethernet Frame Engine (FE) to the CPU. Introduce support for the second
QDMA controller. This is a preliminary series to support multiple FE ports
(e.g. connected to a second PHY controller).

Changes since v1:
- squash patch 6/9 and 7/9
- move some duplicated code from patch 2/9 in 1/9
- cosmetics
====================

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