man.4: Add .Sh HARDWARE for some wireless drivers for release notes

iwlwifi.4 and rtw88.4 did not show up in the hardware list in the
release notes for 13.4.
The doc/website/tools/hardware-notes-processor.rb script parses
the .Sh HARDWARE section to automagically create a note once the
manual page is listed in the website/archetypes/release/hardware.adoc
file.

While here update the other committed man pages not yet connected
to the build.

Reported by: re (cperciva), grahamperrin
Sponsored by: The FreeBSD Foundation
MFC after: 3 days
Reviewed by: concussious.bugzilla_runbox.com (Alexander Ziaee)
Differential Revision: https://reviews.freebsd.org/D46851