ARM: dts: imx6ull-colibri: update device trees to support overlays

Prepare in-tree device trees for out-of-tree device tree overlay support
(eMMC SKU only).

Relocate panel-dpi default to edt,et057090dhu (RGB 18bit VGA 640x480)
to the module-level dtsi and remove it from the carrier board dtsi.

Keep backlight, resistive touch and Atmel maxtouch nodes enabled
for both eMMC and NAND modules.

Signed-off-by: Denys Drozdov <[e-mail]>
Signed-off-by: Marcel Ziswiler <[e-mail]>
Signed-off-by: Shawn Guo <[e-mail]>

arch/arm/boot/dts/imx6ull-colibri-eval-v3.dtsi

···
 		clock-frequency = <16000000>;
 	};
 
-	panel: panel {
-		compatible = "edt,et057090dhu";
-		backlight = <&bl>;
-		power-supply = <&reg_3v3>;
-
-		port {
-			panel_in: endpoint {
-				remote-endpoint = <&lcdif_out>;
-			};
-		};
-	};
 
 	reg_3v3: regulator-3v3 {
 		compatible = "regulator-fixed";
···
 	status = "okay";
 };
 
-&bl {
-	brightness-levels = <0 4 8 16 32 64 128 255>;
-	default-brightness-level = <6>;
-	power-supply = <&reg_3v3>;
-	pwms = <&pwm4 0 5000000 1>;
-	status = "okay";
-};
-
 &ecspi1 {
 	status = "okay";
 
···
 	m41t0m6: rtc@68 {
 		compatible = "st,m41t0";
 		reg = <0x68>;
-	};
-};
-
-&lcdif {
-	status = "okay";
-
-	port {
-		lcdif_out: endpoint {
-			remote-endpoint = <&panel_in>;
-		};
 	};
 };
 

arch/arm/boot/dts/imx6ull-colibri.dtsi

···
 		ethernet1 = &fec1;
 	};
 
-	bl: backlight {
+	backlight: backlight {
 		compatible = "pwm-backlight";
+		brightness-levels = <0 4 8 16 32 64 128 255>;
+		default-brightness-level = <6>;
+		enable-gpios = <&gpio1 11 GPIO_ACTIVE_HIGH>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_gpio_bl_on>;
-		enable-gpios = <&gpio1 11 GPIO_ACTIVE_HIGH>;
-		status = "disabled";
+		power-supply = <&reg_3v3>;
+		pwms = <&pwm4 0 5000000 1>;
+		status = "okay";
+	};
+
+	panel_dpi: panel-dpi {
+		compatible = "edt,et057090dhu";
+		backlight = <&backlight>;
+		power-supply = <&reg_3v3>;
+		status = "okay";
+
+		port {
+			lcd_panel_in: endpoint {
+				remote-endpoint = <&lcdif_out>;
+			};
+		};
 	};
 
 	reg_module_3v3: regulator-module-3v3 {
···
 	scl-gpios = <&gpio1 30 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
 	status = "okay";
 
-	ad7879@2c {
+	ad7879_ts: touchscreen@2c {
 		compatible = "adi,ad7879-1";
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_snvs_ad7879_int>;
···
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_lcdif_dat
 		     &pinctrl_lcdif_ctrl>;
+
+	port {
+		lcdif_out: endpoint {
+			remote-endpoint = <&lcd_panel_in>;
+		};
+	};
 };
 
 &pwm4 {