exynos4210: dts: fix gpio offset in pinctrl-uboot

The gpy0 don't need any additional register offset,
but the gpx0 does, so now it is fixed.

Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>

arch/arm/dts/exynos4210-pinctrl-uboot.dtsi

@@ -14,7 +14,7 @@
 	pinctrl_1: pinctrl@11000000 {
 		#address-cells = <1>;
 		#size-cells = <0>;
-		gpy0: gpy0 {
+		gpx0: gpx0 {
 			reg = <0xc00>;
 		};
 	};