dt-bindings: power: supply: gpio-charger: add missing semi-colon in example

Fix the example documentation which is missing a semi-colon.
Signed-off-by: Sebastien Bourdelin <sebastien.bourdelin@gmail.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

Documentation/devicetree/bindings/power/supply/gpio-charger.txt

@@ -20,7 +20,7 @@ Example:
 		compatible = "gpio-charger";
 		charger-type = "usb-sdp";
 		gpios = <&gpf0 2 0 0 0>;
-	}
+	};
 
 	battery {
 		power-supplies = <&usb_charger>;