ARM: dts: colibri_imx7: Fix lcdif node definition

Fix lcdif DT node and make it conform to the structure defined in the
Linux devicetree bindings [1]. Currently there is support only for
old style lcdif node definitions.

[1] https://www.kernel.org/doc/Documentation/devicetree/bindings/display/mxsfb.txtSigned-off-by: NIgor Opaniuk <igor.opaniuk@toradex.com>
Reviewed-by: NOleksandr Suvorov <oleksandr.suvorov@toradex.com>

arch/arm/dts/imx7-colibri.dtsi

@@ -113,13 +113,17 @@
 };
 
 &lcdif {
+	status = "okay";
+	display = <&display0>;
 	u-boot,dm-pre-reloc;
+
+	display0: display0 {
+		bits-per-pixel = <18>;
+		bus-width = <24>;
 		status = "okay";
 
 		display-timings {
 			native-mode = <&timing_vga>;
-
-		/* Standard VGA timing */
 			timing_vga: 640x480 {
 				u-boot,dm-pre-reloc;
 				clock-frequency = <25175000>;
@@ -138,4 +142,5 @@
 				pixelclk-active = <0>;
 			};
 		};
+	};
 };