ARM: dts: imx6ul-pico: Convert to DRM bindings

Documentation/devicetree/bindings/display/mxsfb.txt states that
the current display bindings format used in this dts is deprecated.

Convert it to the preferred DRM bindings instead.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6ul-pico.dtsi

@@ -20,7 +20,7 @@ chosen {
 		stdout-path = &uart6;
 	};
 
-	backlight {
+	backlight: backlight {
 		compatible = "pwm-backlight";
 		pwms = <&pwm3 0 5000000>;
 		brightness-levels = <0 4 8 16 32 64 128 255>;
@@ -72,6 +72,17 @@ reg_brcm: regulator-brcm {
 		regulator-max-microvolt = <3300000>;
 		startup-delay-us = <200000>;
 	};
+
+	panel {
+		compatible = "vxt,vl050-8048nt-c01";
+		backlight = <&backlight>;
+
+		port {
+			panel_in: endpoint {
+				remote-endpoint = <&display_out>;
+			};
+		};
+	};
 };
 
 &can1 {
@@ -154,31 +165,11 @@ vref_reg: vrefddr {
 &lcdif {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_lcdif_dat &pinctrl_lcdif_ctrl>;
-	display = <&display0>;
 	status = "okay";
 
-	display0: display0 {
-		bits-per-pixel = <32>;
-		bus-width = <24>;
-
-		display-timings {
-			native-mode = <&timing0>;
-
-			timing0: timing0 {
-				clock-frequency = <33200000>;
-				hactive = <800>;
-				vactive = <480>;
-				hfront-porch = <210>;
-				hback-porch = <46>;
-				hsync-len = <1>;
-				vback-porch = <22>;
-				vfront-porch = <23>;
-				vsync-len = <1>;
-				hsync-active = <0>;
-				vsync-active = <0>;
-				de-active = <1>;
-				pixelclk-active = <0>;
-			};
+	port {
+		display_out: endpoint {
+			remote-endpoint = <&panel_in>;
 		};
 	};
 };