Merge branch 'Felix-DSA-probing-cleanup'

Vladimir Oltean says:

====================
Probing cleanup for the Felix DSA driver

This is a follow-up to Russell King's request for code consolidation
among felix_vsc9959, seville_vsc9953 and ocelot_ext, stated here:
https://lore.kernel.org/all/Zh1GvcOTXqb7CpQt@shell.armlinux.org.uk/

Details are in individual patches. Testing was done on NXP LS1028A
(felix_vsc9959).
====================

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