ARM: dts: stm32f429: Adopt STM32 RNG driver

New bindings and driver have been created for STM32 series parts. This
patch integrates this changes.
Signed-off-by: NDaniel Thompson <daniel.thompson@linaro.org>
Acked-by: NMaxime Coquelin <mcoquelin.stm32@gmail.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

arch/arm/boot/dts/stm32f429.dtsi

@@ -174,6 +174,13 @@
 			reg = <0x40023800 0x400>;
 			clocks = <&clk_hse>;
 		};
+
+		rng: rng@50060800 {
+			compatible = "st,stm32-rng";
+			reg = <0x50060800 0x400>;
+			interrupts = <80>;
+			clocks = <&rcc 0 38>;
+		};
 	};
 };