ARM: dts: imx28-m28cu: Fix display duplicate name warning

The lcdif node has a property named "display" and also a child node
called "display", which causes the following warning:

device-tree: Duplicate name in lcdif@80030000, renamed to "display#1"

Rename the child node name in order to avoid the warning.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>

arch/arm/boot/dts/imx28-m28cu3.dts

@@ -115,10 +115,10 @@ lcdif@80030000 {
 				pinctrl-names = "default";
 				pinctrl-0 = <&lcdif_24bit_pins_a
 					     &lcdif_pins_m28>;
-				display = <&display>;
+				display = <&display0>;
 				status = "okay";
 
-				display: display0 {
+				display0: display0 {
 					bits-per-pixel = <32>;
 					bus-width = <24>;