arm: dts: rockchip: px30: add and enable rng node

Add enable rng node in px30-evb-u-boot.dtsi.

Signed-off-by: Lin Jinhan <troy.lin@rock-chips.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/dts/px30-evb-u-boot.dtsi b/arch/arm/dts/px30-evb-u-boot.dtsi
index aea9f4d..61b1433 100644
--- a/arch/arm/dts/px30-evb-u-boot.dtsi
+++ b/arch/arm/dts/px30-evb-u-boot.dtsi
@@ -4,3 +4,7 @@
  */
 
 #include "px30-u-boot.dtsi"
+
+&rng {
+	status = "okay";
+};
diff --git a/arch/arm/dts/px30-u-boot.dtsi b/arch/arm/dts/px30-u-boot.dtsi
index bb782b4..029c8fb 100644
--- a/arch/arm/dts/px30-u-boot.dtsi
+++ b/arch/arm/dts/px30-u-boot.dtsi
@@ -12,6 +12,12 @@
 	chosen {
 		u-boot,spl-boot-order = &emmc, &sdmmc;
 	};
+
+	rng: rng@ff0b0000 {
+		compatible = "rockchip,cryptov2-rng";
+		reg = <0x0 0xff0b0000 0x0 0x4000>;
+		status = "disabled";
+	};
 };
 
 &dmc {