ARM: dts: exynos: Update x and y properties for mms114 touchscreen

The mms114 binding [1] specifies that the 'x' and 'y' should be
called respectively 'touchscreen-size-x' and 'touchscreen-size-y'
in coherence with the touchscreen [2] binding.

Update the mms114 node for trats2 and trats dts according to the
binding.

[1] Documentation/devicetree/bindings/input/touchscreen/mms114.txt
[2] Documentation/devicetree/bindings/input/touchscreen/touchscreen.txt
Signed-off-by: NAndi Shyti <andi.shyti@samsung.com>
Signed-off-by: NKrzysztof Kozlowski <krzk@kernel.org>

arch/arm/boot/dts/exynos4210-trats.dts

@@ -259,8 +259,8 @@
 		reg = <0x48>;
 		interrupt-parent = <&gpx0>;
 		interrupts = <4 IRQ_TYPE_EDGE_FALLING>;
-		x-size = <720>;
-		y-size = <1280>;
+		touchscreen-size-x = <720>;
+		touchscreen-size-y = <1280>;
 		avdd-supply = <&tsp_reg>;
 		vdd-supply = <&tsp_reg>;
 	};

arch/arm/boot/dts/exynos4412-galaxy-s3.dtsi

@@ -118,8 +118,8 @@
 		reg = <0x48>;
 		interrupt-parent = <&gpm2>;
 		interrupts = <3 IRQ_TYPE_EDGE_FALLING>;
-		x-size = <720>;
-		y-size = <1280>;
+		touchscreen-size-x = <720>;
+		touchscreen-size-y = <1280>;
 		avdd-supply = <&ldo23_reg>;
 		vdd-supply = <&ldo24_reg>;
 	};