ARM: dts: NSP: Add SP805 Support to DT

Add support for the ARM SP805 Watchdog timer to the Northstar Plus
device tree.

Signed-off-by: Jon Mason <[e-mail]>
Signed-off-by: Florian Fainelli <[e-mail]>

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

···
 			clock-frequency = <100000>;
 		};
 
+		watchdog@39000 {
+			compatible = "arm,sp805", "arm,primecell";
+			reg = <0x39000 0x1000>;
+			interrupts = <GIC_SPI 126 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&iprocslow>, <&iprocslow>;
+			clock-names = "wdogclk", "apb_pclk";
+		};
+
 		lcpll0: lcpll0@3f100 {
 			#clock-cells = <1>;
 			compatible = "brcm,nsp-lcpll0";