MFC r357414, r357415, r357417, r357423, r357424, r357587, r357655:
ethernet: add some more Ethertypes.
Add some types based on other BSDs and also add EtherCat, PROFINET, Powerlink
and Sercos III which are IEC standards.
There is a public list (CSV format) at:
https://standards.ieee.org/products-services/regauth/
Spacing cleanups.
No functional change.