ARM: dts: imx7-colibri: multiple node updates

1. Move u-boot specific nodes to u-boot dts include: legacy lcdif
node and aliases.
2. Add iomux configuration for LCD.
3. Drop un-needed u-boot,dm-pre-reloc for alias node.
4. Fix display-timings, use the one from Toradex downstream kernel [1]

[1]: https://git.toradex.com/cgit/linux-toradex.git/tree/arch/arm/boot/dts/imx7-colibri-eval-v3.dtsi?h=toradex_4.9-2.3.x-imx#n206
Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
diff --git a/arch/arm/dts/imx7-colibri-rawnand.dts b/arch/arm/dts/imx7-colibri-rawnand.dts
index 5f12a2a..5211fb1 100644
--- a/arch/arm/dts/imx7-colibri-rawnand.dts
+++ b/arch/arm/dts/imx7-colibri-rawnand.dts
@@ -5,17 +5,19 @@
 
 /dts-v1/;
 #include "imx7-colibri.dtsi"
+#include "imx7-colibri-u-boot.dtsi"
 
 / {
 	model = "Toradex Colibri iMX7S/D";
 	compatible = "toradex,imx7-colibri", "fsl,imx7";
 
-	chosen {
-		stdout-path = &uart1;
+	aliases {
+		display1 = &lcdif;
+		usb0 = &usbotg1; /* required for ums */
 	};
 
-	aliases {
-		usb0 = &usbotg1; /* required for ums */
+	chosen {
+		stdout-path = &uart1;
 	};
 
 	reg_5v0: regulator-5v0 {