hook-functions: Include io-domain in dw_mmc-rockchip hidden dependencies

Initramfs-tools can add the "drivers/power/avs/rockchip-io-domain.ko"
module to the initramfs since commit ded7214cbff ("hook-functions:
Handle dw_mmc-rockchip hidden dependency on rockchip-io-domain").
However, this module was renamed to "drivers/soc/rockchip/io-domain.ko"
as of Linux 5.10. Include the new name in the dependency list as well.

Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
Link: https://salsa.debian.org/kernel-team/initramfs-tools/-/commit/db7aec447eac0e5e88d114fccae1bea964924051


Signed-off-by: Christopher Obbard <chris.obbard@collabora.com>