Add wakeup-source property to enable Wake on Lan functionality in the
switch.
Since PME wake pin is not always attached to the SoC, use wakeup-source
instead of wakeup-gpios
Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
Acked-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>