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
Approved by: re (cperciva)
Differential Revision: https://reviews.freebsd.org/D38238

(cherry picked from commit ffdf10fb9cf13464801f2d78d3e1470201394812)
(cherry picked from commit b45e9a172d3830bed00018325eaa73c04a0b3a13)