ARM: dts: imx6qdl: add IPU aliases

This allows for consistent numbering of the IPU output and
input ports.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
diff --git a/arch/arm/boot/dts/imx6q.dtsi b/arch/arm/boot/dts/imx6q.dtsi
index 399103b..a266a56 100644
--- a/arch/arm/boot/dts/imx6q.dtsi
+++ b/arch/arm/boot/dts/imx6q.dtsi
@@ -14,6 +14,7 @@
 
 / {
 	aliases {
+		ipu1 = &ipu2;
 		spi4 = &ecspi5;
 	};