dt-bindings: Document the hi3660 thermal sensor binding

This adds documentation of device tree bindings for the
thermal sensor controller of hi3660 SoC.
Signed-off-by: NKevin Wangtao <kevin.wangtao@linaro.org>
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NWei Xu <xuwei5@hisilicon.com>

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

@@ -13,6 +13,7 @@
 
 Example :
 
+for Hi6220:
 	tsensor: tsensor@0,f7030700 {
 		compatible = "hisilicon,tsensor";
 		reg = <0x0 0xf7030700 0x0 0x1000>;
@@ -21,3 +22,11 @@ Example :
 		clock-names = "thermal_clk";
 		#thermal-sensor-cells = <1>;
 	}
+
+for Hi3660:
+	tsensor: tsensor@fff30000 {
+		compatible = "hisilicon,hi3660-tsensor";
+		reg = <0x0 0xfff30000 0x0 0x1000>;
+		interrupts = <GIC_SPI 145 IRQ_TYPE_LEVEL_HIGH>;
+		#thermal-sensor-cells = <1>;
+	};