Add functions to powerdown and powerup from suspend, in
order to save power.
Signed-off-by: NRobert Jarzmik <robert.jarzmik@free.fr>
Reviewed-by: NIvan Djelic <ivan.djelic@parrot.com>
Reviewed-by: NMike Dunn <mikedunn@newsguy.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>