ARM: bcm281xx: DT changes for reboot code

This patch adds the device tree bindings for the bcm281xx reboot code.
Signed-off-by: Markus Mayer <markus.mayer@linaro.org>
Reviewed-by: Tim Kryger <tim.kryger@linaro.org>
Acked-by: Christian Daudt <csd@broadcom.com>

Documentation/devicetree/bindings/arm/bcm/kona-wdt.txt

+Broadcom Kona Family Watchdog Timer
+-----------------------------------
+
+This watchdog timer is used in the following Broadcom SoCs:
+  BCM11130, BCM11140, BCM11351, BCM28145, BCM28155
+
+Required properties:
+  - compatible = "brcm,bcm11351-wdt", "brcm,kona-wdt";
+  - reg: memory address & range
+
+Example:
+	watchdog@35002f40 {
+		compatible = "brcm,bcm11351-wdt", "brcm,kona-wdt";
+		reg = <0x35002f40 0x6c>;
+	};

arch/arm/boot/dts/bcm11351.dtsi

 /*
- * Copyright (C) 2012 Broadcom Corporation
+ * Copyright (C) 2012-2013 Broadcom Corporation
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
@@ -56,6 +56,11 @@ L2: l2-cache {
 		cache-level = <2>;
 	};
 
+	watchdog@35002f40 {
+		compatible = "brcm,bcm11351-wdt", "brcm,kona-wdt";
+		reg = <0x35002f40 0x6c>;
+	};
+
 	timer@35006000 {
 		compatible = "bcm,kona-timer";
 		reg = <0x35006000 0x1000>;