Add support for SAMA7G5 power management modes: standby, ulp0, ulp1, backup.
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210415105010.569620-24-claudiu.beznea@microchip.com