arm64: dts: rockchip: Add Hantro encoder node to rk356x

The RK3566 and RK3568 come with a dedicated Hantro instance solely for
encoding. This patch adds a node for this to the device tree, along with
a node for its MMU.

Signed-off-by: Nicolas Frattaroli <frattaroli.nicolas@gmail.com>
Link: https://lore.kernel.org/r/20220612155346.16288-4-frattaroli.nicolas@gmail.com


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