arm64: dts: rockchip: add rk3568 tsadc nodes

Add the thermal and tsadc nodes to the rk3568 device tree.
There are two sensors, one for the cpu, one for the gpu.

Signed-off-by: Peter Geis <pgwipeout@gmail.com>
Link: https://lore.kernel.org/r/20210728180034.717953-6-pgwipeout@gmail.com


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