Merge branch 'if_ether-h-add-industrial-fieldbus-ethertypes'

Daniel Braunwarth says:

====================
if_ether.h: add industrial fieldbus Ethertypes

This set of patches adds the Ethertypes for PROFINET and EtherCAT.

The defines should be used by iproute2 to extend the list of available link
layer protocols.
====================

Link: https://lore.kernel.org/r/20220228133029.100913-1-daniel@braunwarth.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>