Save and restore registers for the PWM on suspend and resume, which
makes hibernation and backup modes possible.
Signed-off-by: NRomain Izard <romain.izard.pro@gmail.com>
Acked-by: NNicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: NThierry Reding <thierry.reding@gmail.com>