Use iflib_if_init_locked() during resume instead of iflib_init_locked().
iflib_init_locked() assumes that iflib_stop() has been called, however,
it is not called for suspend. iflib_if_init_locked() calls stop then init,
so fixes the problem.
This was causing errors after a resume from suspend.
Reported by: zeising
MFC after: 1 week
Sponsored by: Limelight Networks