[ARM] dtsi: added secondery CPU nodes for zynqmp

This code adds all secondary CPU nodes in zynqmp device tree.

Signed-off-by: Bhargav Shah <bhargavshah1988@gmail.com>

arch/arm/board/generic/dts/zynqmp/zynqmp.dtsi

@@ -16,6 +16,27 @@
 			enable-method = "psci";
 			reg = <0x0>;
 		};
+
+		cpu@1 {
+			compatible = "arm,cortex-a53", "arm,armv8";
+			device_type = "cpu";
+			enable-method = "psci";
+			reg = <0x1>;
+		};
+
+		cpu@2 {
+			compatible = "arm,cortex-a53", "arm,armv8";
+			device_type = "cpu";
+			enable-method = "psci";
+			reg = <0x2>;
+		};
+
+		cpu@3 {
+			compatible = "arm,cortex-a53", "arm,armv8";
+			device_type = "cpu";
+			enable-method = "psci";
+			reg = <0x3>;
+		};
 	};
 
 	memory {