Merge tag 'litex-6.13-rc1' of https://github.com/litex-hub/linux into soc/drivers

LiteX updates for next

Remaining LiteX updates from 2024, reviewed and
successfully tested against v6.13-rc1.

Signed-off-by: Gabriel Somlo <gsomlo@gmail.com>
* tag 'litex-6.13-rc1' of https://github.com/litex-hub/linux:
  drivers/soc/litex: Use devm_register_restart_handler()

Link: https://lore.kernel.org/r/Z41PgCffqPUTyxkE@errol.ini.cmu.edu
Signed-off-by: Arnd Bergmann <arnd@arndb.de>