dwxe(4) on OpenBSD

The text f777a30a55f4, as OpenBSD 6.9, OpenBSD 6.8, OpenBSD 6.7, OpenBSD 6.6, OpenBSD 6.5, OpenBSD 6.4, OpenBSD 6.3 shipped it.

Allwinner EMAC 10/100/Gigabit Ethernet device