arm64: dts: rockchip: add core dtsi for RK3562 SoC

RK3562 is a SoC from Rockchip, which embedded with quad
ARM Cortex-A53.

Signed-off-by: Finley Xiao <finley.xiao@rock-chips.com>
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Link: https://lore.kernel.org/r/20250509102308.761424-5-kever.yang@rock-chips.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

Author: finley1226