if_media: Add new 2.5G/5G/25G/40G/50G/100G/200G/400G media types

Upcoming Ethernet hardware will support new media types that aren't in the kernel
yet, so they are added here. These mostly include new 25G/50G/100G media types;
and this commit introduces new 200G/400G speeds and media.

Reviewed by: hselasky@, jhb@
MFC after: 1 week
Sponsored by: Intel Corporation
Differential Revision: https://reviews.freebsd.org/D16731