pgt(4) on OpenBSD

The text f0223519cb8e, as OpenBSD 7.0, OpenBSD 6.9, OpenBSD 6.8, OpenBSD 6.7, OpenBSD 6.6, OpenBSD 6.5 shipped it.

Conexant/Intersil Prism GT Full-MAC IEEE 802.11a/b/g wireless network device