Support ADB keyboards as console. Only use adb if no USB keyboard is present.  Code mostly borrowed from NetBSD.
Support ADB keyboards as console. Only use adb if no USB keyboard is
present.  Code mostly borrowed from NetBSD.

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars