arm64: dts: rockchip: px30/rk3326: add rng as hardware random pool input

Sometimes, the random pool initialization is too slow in reocvery mode,
use hw_random to speed up it.

Change-Id: Iabc37548ef03e60dca9707126750629efafbfe6d
Signed-off-by: Ziyuan Xu <xzy.xu@rock-chips.com>

arch/arm64/boot/dts/rockchip/px30-robot.dtsi

@@ -53,6 +53,10 @@
 	/delete-node/ opp-768000000;
 };
 
+&rng {
+	status = "okay";
+};
+
 &soc_thermal {
 	trips {
 		threshold: trip-point-0 {

arch/arm64/boot/dts/rockchip/rk3326-linux.dtsi

@@ -107,6 +107,10 @@
 	};
 };
 
+&rng {
+	status = "okay";
+};
+
 &video_phy {
 	status = "okay";
 };