ARM: dts: imx6dl: prtvt7: Remove touchscreen inversion

This touchscreen does not seem to be inverted in any axis, so remove these
DT properties.
Signed-off-by: David Jander <david@protonic.nl>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6dl-prtvt7.dts

@@ -267,8 +267,6 @@ touchscreen {
                               <&adc_ts 5>;
 		io-channel-names = "y", "z1", "z2", "x";
 		touchscreen-min-pressure = <64687>;
-		touchscreen-inverted-x;
-		touchscreen-inverted-y;
 		touchscreen-x-plate-ohms = <300>;
 		touchscreen-y-plate-ohms = <800>;
 	};