ARM: dts: k2hk: add dts node for k2hk hw_rng driver

This patch adds dts node for k2hk hw_random generator driver
Signed-off-by: Vitaly Andrianov <vitalya@ti.com>
[t-kristo@ti.com: added missing addresses from node identifiers]
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>

arch/arm/boot/dts/keystone-k2hk-netcp.dtsi

@@ -228,3 +228,23 @@ interface-1 {
 		};
 	};
 };
+
+sa_subsys: subsys@20c0000 {
+	compatible = "simple-bus";
+	#address-cells = <1>;
+	#size-cells = <1>;
+	ranges = <0 0x20c0000 0x40000>;
+
+	sa_config: subsys@0 {
+		compatible = "syscon";
+		reg = <0x0 0x100>;
+	};
+
+	rng@24000 {
+		compatible = "ti,keystone-rng";
+		reg = <0x24000 0x1000>;
+		ti,syscon-sa-cfg = <&sa_config>;
+		clocks = <&clksa>;
+		clock-names = "fck";
+	};
+};