ARM: bcm2835: dt: Add the mailbox to the device tree

Signed-off-by: NEric Anholt <eric@anholt.net>
Acked-by: NLee Jones <lee.jones@linaro.org>
Acked-by: NStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

arch/arm/boot/dts/bcm2835.dtsi

@@ -61,6 +61,13 @@
 			reg = <0x7e104000 0x10>;
 		};
 
+		mailbox: mailbox@7e00b800 {
+			compatible = "brcm,bcm2835-mbox";
+			reg = <0x7e00b880 0x40>;
+			interrupts = <0 1>;
+			#mbox-cells = <0>;
+		};
+
 		gpio: gpio@7e200000 {
 			compatible = "brcm,bcm2835-gpio";
 			reg = <0x7e200000 0xb4>;