MFC r368561:

ndis(4): expand deprecation to the whole driver

nids(4) was a clever idea in the early 2000's when the market was
flooded with 10/100 NICs with Windows-only drivers, but that hasn't been
the case for ages and the driver has had no meaningful maintenance in
ages. It only supports Windows-XP era drivers.

Reviewed by: imp, bcr
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D27527