ARM: dts: apf27dev: 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: NMartin Kaiser <martin@kaiser.cx>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx27-apf27dev.dts

@@ -12,10 +12,10 @@
 
 	display: display {
 		model = "Chimei-LW700AT9003";
-		native-mode = <&timing0>;
 		bits-per-pixel = <16>;  /* non-standard but required */
 		fsl,pcr = <0xfae80083>;	/* non-standard but required */
 		display-timings {
+			native-mode = <&timing0>;
 			timing0: 800x480 {
 				clock-frequency = <33000033>;
 				hactive = <800>;