power: reset: brcm-kona-reset: Use devm_register_sys_off_handler(RESTART)

Use device life-cycle managed register function to simplify probe.

Signed-off-by: Andrew Davis <afd@ti.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://lore.kernel.org/r/20240212162831.67838-8-afd@ti.com


Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>