dt-bindings: rockchip-thermal: Support the RK3328 SoC compatible

attempt to new compatible for thermal founding on RK3328 SoC.
Signed-off-by: Rocky Hao <rocky.hao@rock-chips.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>

Documentation/devicetree/bindings/thermal/rockchip-thermal.txt

@@ -4,6 +4,7 @@ Required properties:
 - compatible : should be "rockchip,<name>-tsadc"
    "rockchip,rk3228-tsadc": found on RK3228 SoCs
    "rockchip,rk3288-tsadc": found on RK3288 SoCs
+   "rockchip,rk3328-tsadc": found on RK3328 SoCs
    "rockchip,rk3368-tsadc": found on RK3368 SoCs
    "rockchip,rk3399-tsadc": found on RK3399 SoCs
 - reg : physical base address of the controller and length of memory mapped