BCM270X_DT: Add bcm2835-pm-wdt and bcm2835-rng

This makes it possible to use the mainline watchdog and
random generator drivers:
dtparam=watchdog=on
dtparam=random=on

bcm2708_wdog and bcm2708-rng can still be used.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

Author: notro

arch/arm/boot/dts/bcm2708-rpi-b-plus.dts

@@ -124,5 +124,7 @@
 		pwr_led_trigger = <&pwr_led>,"linux,default-trigger";
 
 		audio = <&audio>,"status";
+		watchdog = <&watchdog>,"status";
+		random = <&random>,"status";
 	};
 };

arch/arm/boot/dts/bcm2708-rpi-b.dts

@@ -114,5 +114,7 @@
 		act_led_trigger = <&act_led>,"linux,default-trigger";
 
 		audio = <&audio>,"status";
+		watchdog = <&watchdog>,"status";
+		random = <&random>,"status";
 	};
 };

arch/arm/boot/dts/bcm2708_common.dtsi

@@ -43,6 +43,18 @@
 			#interrupt-cells = <2>;
 		};
 
+		watchdog: watchdog@7e100000 {
+			compatible = "brcm,bcm2835-pm-wdt";
+			reg = <0x7e100000 0x28>;
+			status = "disabled";
+		};
+
+		random: rng@7e104000 {
+			compatible = "brcm,bcm2835-rng";
+			reg = <0x7e104000 0x10>;
+			status = "disabled";
+		};
+
 		mailbox: mailbox@7e00b800 {
 			compatible = "brcm,bcm2708-vcio";
 			reg = <0x7e00b880 0x40>;

arch/arm/boot/dts/bcm2709-rpi-2-b.dts

@@ -124,5 +124,7 @@
 		pwr_led_trigger = <&pwr_led>,"linux,default-trigger";
 
 		audio = <&audio>,"status";
+		watchdog = <&watchdog>,"status";
+		random = <&random>,"status";
 	};
 };