FROMLIST: ARM: prima2: Register with kernel restart handler

Register with kernel restart handler instead of setting arm_pm_restart
directly. By doing this, the prima2 reset handler can be prioritized
among other restart methods available on a particular board.

Select a high priority of 192 since the original code overwrites the
default arm restart handler.

Bug: 146512338
Change-Id: I7b1f295a8a68c75d502ce050429297c2644233fb
Link: https://lore.kernel.org/patchwork/patch/1139626/


Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Thierry Reding <treding@nvidia.com>