ARM: dts: imx6-tx6: remove obsolete ipu1 alias

The 'ipu1' alias is already defined in imx6q.dtsi. There is no need to
redefine it here.
Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6q-tx6q-11x0-mb7.dts

@@ -49,7 +49,6 @@ / {
 
 	aliases {
 		display = &lvds0;
-		ipu1 = &ipu2;
 		lvds0 = &lvds0;
 		lvds1 = &lvds1;
 	};