arm64: dts: rockchip: add pmu and qos nodes for rk3568

Add the power-management and QoS nodes to the core rk3568 dtsi.

Signed-off-by: Liang Chen <cl@rock-chips.com>
Link: https://lore.kernel.org/r/20210624131027.3719-1-cl@rock-chips.com


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