ARM: dts: nsp: Add rng device tree entry

Add support for the random number generator to the Northstar Plus
SoC device tree.
Signed-off-by: Yendapally Reddy Dhananjaya Reddy <yendapally.reddy@broadcom.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

arch/arm/boot/dts/bcm-nsp.dtsi

@@ -206,6 +206,11 @@ nand: nand@26000 {
 			brcm,nand-has-wp;
 		};
 
+		rng: rng@33000 {
+			compatible = "brcm,bcm-nsp-rng";
+			reg = <0x33000 0x14>;
+		};
+
 		ccbtimer0: timer@34000 {
 			compatible = "arm,sp804";
 			reg = <0x34000 0x1000>;