IPQ40xx: Add PRNG support

Since we now have the driver for Qualcomm PRNG HW, lets use it and add the necessary clocks and nodes.

Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Cc: Luka Perkov <luka.perkov@sartura.hr>
diff --git a/arch/arm/dts/qcom-ipq4019.dtsi b/arch/arm/dts/qcom-ipq4019.dtsi
index 031691e..7a52ea2 100644
--- a/arch/arm/dts/qcom-ipq4019.dtsi
+++ b/arch/arm/dts/qcom-ipq4019.dtsi
@@ -60,6 +60,13 @@
 			u-boot,dm-pre-reloc;
 		};
 
+		rng: rng@22000 {
+			compatible = "qcom,prng";
+			reg = <0x22000 0x140>;
+			clocks = <&gcc GCC_PRNG_AHB_CLK>;
+			status = "disabled";
+		};
+
 		reset: gcc-reset@1800000 {
 			compatible = "qcom,gcc-reset-ipq4019";
 			reg = <0x1800000 0x60000>;