ARM: dts: rockchip: add io-domains nodes to rv1108.dtsi

The compatible strings below were added to
rockchip-io-domain.txt, but never added to the device tree,
so add io-domains nodes to rv1108.dtsi

"rockchip,rv1108-io-voltage-domain"
"rockchip,rv1108-pmu-io-voltage-domain"

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/20210625111746.6269-4-jbx6244@gmail.com


Signed-off-by: Heiko Stuebner <heiko@sntech.de>