arm: dts: rockchip: rk3399: enable rng at the SoC level

The rng is embedded in the SoC so enable it in the device tree
universally, the use of it can be controlled by enabling/disabling
at the device config level.

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Cc: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Kever Yang<kever.yang@rock-chips.com>
diff --git a/arch/arm/dts/rk3399-u-boot.dtsi b/arch/arm/dts/rk3399-u-boot.dtsi
index ecd230c..73922c3 100644
--- a/arch/arm/dts/rk3399-u-boot.dtsi
+++ b/arch/arm/dts/rk3399-u-boot.dtsi
@@ -32,7 +32,7 @@
 	rng: rng@ff8b8000 {
 		compatible = "rockchip,cryptov1-rng";
 		reg = <0x0 0xff8b8000 0x0 0x1000>;
-		status = "disabled";
+		status = "okay";
 	};
 
 	dmc: dmc {