ARM: bcm2835: add Broadcom BCM2835 RNG to the device tree

This adds a device tree binding for random number generator present on
Broadcom BCM2835 SoC, used in Raspberry Pi and Roku 2 devices.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Tested-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>

arch/arm/boot/dts/bcm2835.dtsi

@@ -34,6 +34,11 @@
 			reg = <0x7e100000 0x28>;
 		};
 
+		rng {
+			compatible = "brcm,bcm2835-rng";
+			reg = <0x7e104000 0x10>;
+		};
+
 		uart@20201000 {
 			compatible = "brcm,bcm2835-pl011", "arm,pl011", "arm,primecell";
 			reg = <0x7e201000 0x1000>;