ARM: dts: mbimxsd25: 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/imx25-eukrea-mbimxsd25-baseboard-cmo-qvga.dts

@@ -14,8 +14,8 @@
 		bits-per-pixel = <16>;
 		fsl,pcr = <0xcad08b80>;
 		bus-width = <18>;
-		native-mode = <&qvga_timings>;
 		display-timings {
+			native-mode = <&qvga_timings>;
 			qvga_timings: 320x240 {
 				clock-frequency = <6500000>;
 				hactive = <320>;