ARM: dts: imx6: RDU2: disallow RMI4 device sleep

This is causing issues with some specific controller configurations, as
the platform isn't power limited it's better to keep it disabled.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Tested-by: Chris Healy <cphealy@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi

@@ -543,7 +543,7 @@ touchscreen@20 {
 
 		rmi4-f01@1 {
 			reg = <0x1>;
-			syna,nosleep-mode = <1>;
+			syna,nosleep-mode = <2>;
 		};
 
 		rmi4-f11@11 {