dt-bindings: clock: Add RK3562 cru

Document the device tree bindings of the rockchip rk3562 SoC
clock and reset unit.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: "Rob Herring (Arm)" <robh@kernel.org>
Link: https://lore.kernel.org/r/20250227105916.2340856-2-kever.yang@rock-chips.com


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