ARM: dts: imx53-ppd: Add touchscreen reset line

Utilise new support in Atmel MaxTouch driver to drive the
touchscreen controllers reset line correctly.
Signed-off-by: Martyn Welch <martyn.welch@collabora.co.uk>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx53-ppd.dts

@@ -525,6 +525,7 @@ &i2c2 {
 
 	touchscreen@4b {
 		compatible = "atmel,maxtouch";
+		reset-gpio = <&gpio5 19 GPIO_ACTIVE_HIGH>;
 		reg = <0x4b>;
 		interrupt-parent = <&gpio5>;
 		interrupts = <4 0x8>;