arm64: dts: actions: Add Reset Controller support for S700 SoC

Add reset controller property and bindings header for the
Actions Semi S700 SoC DTS.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

arch/arm64/boot/dts/actions/s700.dtsi

@@ -5,6 +5,7 @@
 
 #include <dt-bindings/clock/actions,s700-cmu.h>
 #include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/reset/actions,s700-reset.h>
 
 / {
 	compatible = "actions,s700";
@@ -172,6 +173,7 @@ cmu: clock-controller@e0168000 {
 			reg = <0x0 0xe0168000 0x0 0x1000>;
 			clocks = <&hosc>, <&losc>;
 			#clock-cells = <1>;
+			#reset-cells = <1>;
 		};
 
 		sps: power-controller@e01b0100 {