Converting the io-domain driver to the new remove callback.
* tag 'v6.7-rockchip-drivers1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip:
soc/rockchip: io-domain: Convert to platform remove callback returning void
Link: https://lore.kernel.org/r/2578684.Lt9SDvczpP@phil
Signed-off-by: Arnd Bergmann <arnd@arndb.de>