ARM: dts: imx6ul: segin: peb-av-02: Mark stmpe touch as wakeup-source

Mark the STMPE resistive touch controller as a wakeup-source.
Signed-off-by: Stefan Riedmueller <s.riedmueller@phytec.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6ul-phytec-segin-peb-av-02.dtsi

@@ -58,6 +58,7 @@ stmpe: touchscreen@44 {
 		pinctrl-0 = <&pinctrl_stmpe>;
 		interrupts = <3 IRQ_TYPE_LEVEL_LOW>;
 		interrupt-parent = <&gpio5>;
+		wakeup-source;
 		status = "disabled";
 
 		stmpe_touchscreen {