arm64: dts: rockchip: add saradc to rk3568-evb1-v10

Add the SARADC to the device tree of the RK3568 EVB1.
Signed-off-by: Michael Riesch <michael.riesch@wolfvision.net>
Link: https://lore.kernel.org/r/20210823110716.10038-1-michael.riesch@wolfvision.netSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3568-evb1-v10.dts

@@ -360,6 +360,11 @@ &pmu_io_domains {
 	status = "okay";
 };
 
+&saradc {
+	vref-supply = <&vcca_1v8>;
+	status = "okay";
+};
+
 &sdhci {
 	bus-width = <8>;
 	max-frequency = <200000000>;