arm64: dts: Add RNG device tree nodes for APM X-Gene v2 platform

This patch adds device tree nodes to enable driver for True Random
Number Generator (TRNG) on APM X-Gene v2 platforms.
Signed-off-by: Duc Dang <dhdang@apm.com>

arch/arm64/boot/dts/apm/apm-shadowcat.dtsi

@@ -199,6 +199,19 @@ xge1clk: xge1clk@1f62c000 {
 				csr-mask = <0x3>;
 				clock-output-names = "xge1clk";
 			};
+
+			rngpkaclk: rngpkaclk@17000000 {
+				compatible = "apm,xgene-device-clock";
+				#clock-cells = <1>;
+				clocks = <&socplldiv2 0>;
+				reg = <0x0 0x17000000 0x0 0x2000>;
+				reg-names = "csr-reg";
+				csr-offset = <0xc>;
+				csr-mask = <0x10>;
+				enable-offset = <0x10>;
+				enable-mask = <0x10>;
+				clock-output-names = "rngpkaclk";
+			};
 		};
 
 		scu: system-clk-controller@17000000 {
@@ -306,5 +319,12 @@ xgenet1: ethernet@1f620000 {
 			local-mac-address = [00 01 73 00 00 02];
 			phy-connection-type = "xgmii";
 		};
+
+		rng: rng@10520000 {
+			compatible = "apm,xgene-rng";
+			reg = <0x0 0x10520000 0x0 0x100>;
+			interrupts = <0x0 0x41 0x4>;
+			clocks = <&rngpkaclk 0>;
+		};
 	};
 };