ARM: dts: AM4372: cpu(s) node per latest binding

Update AM4372 cpu node to the latest cpus/cpu bindings for ARM.
Signed-off-by: Afzal Mohammed <afzal@ti.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Benoit Cousson <bcousson@baylibre.com>

arch/arm/boot/dts/am4372.dtsi

@@ -22,8 +22,12 @@ aliases {
 	};
 
 	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
 		cpu@0 {
 			compatible = "arm,cortex-a9";
+			device_type = "cpu";
+			reg = <0>;
 		};
 	};