ARM: dts: rockchip: add vpu node for RK3036

Add the vpu node and the node for the attached iommu for RK3036.

Signed-off-by: Alex Bee <knaerzche@gmail.com>
Link: https://lore.kernel.org/r/20210527154455.358869-11-knaerzche@gmail.com


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