ARM: dts: edb7211: native-mode is part of display-timings

Move the native-mode property inside the display-timings node.

According to
Documentation/devicetree/bindings/display/panel/display-timing.txt.
native-mode is a property of the display-timings node.

If it's located outside of display-timings, the native-mode setting is
ignored and the first display timing is used (which is a problem only if
someone adds another display timing).
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/ep7211-edb7211.dts

@@ -25,11 +25,11 @@ backlight: backlight {
 
 	display: display {
 		model = "320x240x4";
-		native-mode = <&timing0>;
 		bits-per-pixel = <4>;
 		ac-prescale = <17>;
 
 		display-timings {
+			native-mode = <&timing0>;
 			timing0: 320x240 {
 				hactive = <320>;
 				hback-porch = <0>;