Merge branch 'link-layer-protocols' into next

Daniel Braunwarth  says:

====================

Update the llproto_names array to allow users to reference the PROFINET
and EtherCAT protocols with the names 'profinet' and 'ethercat'.

These patches depends on the below referenced patch, which extends if_ether.h
with the used ETH_P_xxx defines.

Link: https://lore.kernel.org/netdev/20220228133029.100913-1-daniel@braunwarth.dev/
====================

Signed-off-by: David Ahern <dsahern@kernel.org>