Merge branch 'net-dsa-microchip-ksz8-refactor-fdb-dump-path'

Oleksij Rempel says:

====================
net: dsa: microchip: ksz8: refactor FDB dump path

Refactor FDB dump code path for Microchip KSZ8xxx series. This series
mostly makes some cosmetic reworks and allows to forward errors detected
by the regmap.

Change logs are part of patch commit messages.
====================

Link: https://lore.kernel.org/r/20240403125039.3414824-1-o.rempel@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>