LinuxKPI: device: add device_set_wakeup_enable()

Add a dummy device_set_wakeup_enable() which is used for WoWLAN which we
do not (yet) support and device_wakeup_enable() which is a wrapper to the
former with the enable argument being true.

Sponsored by: The FreeBSD Foundation
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D38238

(cherry picked from commit ffdf10fb9cf13464801f2d78d3e1470201394812)