Use this helper to register sys_off handler. Drivers should move away from setting pm_power_off directly as it only allows for one handler. The new way allows for trying multiple if the first one doesn't work. Signed-off-by: Andrew Davis <afd@ti.com> Link: https://lore.kernel.org/r/20240212162831.67838-13-afd@ti.com Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>