arm64: dts: rockchip: add the saradc for rk3399

This patch adds saradc needed information on rk3399 SoCs.
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3399.dtsi

@@ -303,6 +303,18 @@ its: interrupt-controller@fee20000 {
 		};
 	};
 
+	saradc: saradc@ff100000 {
+		compatible = "rockchip,rk3399-saradc";
+		reg = <0x0 0xff100000 0x0 0x100>;
+		interrupts = <GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>;
+		#io-channel-cells = <1>;
+		clocks = <&cru SCLK_SARADC>, <&cru PCLK_SARADC>;
+		clock-names = "saradc", "apb_pclk";
+		resets = <&cru SRST_P_SARADC>;
+		reset-names = "saradc-apb";
+		status = "disabled";
+	};
+
 	i2c1: i2c@ff110000 {
 		compatible = "rockchip,rk3399-i2c";
 		reg = <0x0 0xff110000 0x0 0x1000>;