ARM: dts: rockchip: add vpu nodes for RK3066 and RK3188

Add the vpu node to the common rk3xxx.dtsi and only the powerdomain
property to the SoC specific device trees.

Signed-off-by: Alex Bee <knaerzche@gmail.com>
Link: https://lore.kernel.org/r/20210527154455.358869-12-knaerzche@gmail.com


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