ARM: tegra: Add CPU nodes to Tegra20 device tree

Add CPU node for Tegra20.
Signed-off-by: NHiroshi Doyu <hdoyu@nvidia.com>
Reviewed-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

arch/arm/boot/dts/tegra20.dtsi

@@ -410,6 +410,23 @@
 		status = "disabled";
 	};
 
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu@0 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a9";
+			reg = <0>;
+		};
+
+		cpu@1 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a9";
+			reg = <1>;
+		};
+	};
+
 	pmu {
 		compatible = "arm,cortex-a9-pmu";
 		interrupts = <0 56 0x04