acx(4) on OpenBSD

The text a82016707c71, as OpenBSD 5.9, OpenBSD 5.8, OpenBSD 5.7, OpenBSD 5.6, OpenBSD 5.5, OpenBSD 5.4, OpenBSD 5.3 shipped it.

TI ACX100/ACX111 IEEE 802.11a/b/g wireless network device