ARM: dts: renesas: armadillo800eva: Add LCD panel

Describe the 5" WVGA TFT LCD panel on the Armadillo-800-EVA development
board, and enable the LCD controller that drives it.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Link: https://lore.kernel.org/r/278339322dcaaedc0d68fc67f1f1272d880084d7.1700669207.git.geert+renesas@glider.be

arch/arm/boot/dts/renesas/r8a7740-armadillo800eva.dts

@@ -132,7 +132,7 @@ i2c2: i2c-2 {
 		i2c-gpio,delay-us = <5>;
 	};
 
-	backlight {
+	backlight: backlight {
 		compatible = "pwm-backlight";
 		pwms = <&tpu 2 33333 PWM_POLARITY_INVERTED>;
 		brightness-levels = <0 1 2 4 8 16 32 64 128 255>;
@@ -143,6 +143,18 @@ backlight {
 		enable-gpios = <&pfc 61 GPIO_ACTIVE_HIGH>;
 	};
 
+	panel {
+		compatible = "ampire,am-800480l1tmqw-t00h";
+		backlight = <&backlight>;
+		power-supply = <&reg_5p0v>;
+
+		port {
+			panel_in: endpoint {
+				remote-endpoint = <&lcdc0_rgb>;
+			};
+		};
+	};
+
 	sound {
 		compatible = "simple-audio-card";
 
@@ -228,10 +240,22 @@ rtc@30 {
 	};
 };
 
-&pfc {
+&lcdc0 {
 	pinctrl-0 = <&lcd0_pins>;
 	pinctrl-names = "default";
 
+	status = "okay";
+
+	ports {
+		port@0 {
+			endpoint {
+				remote-endpoint = <&panel_in>;
+			};
+		};
+	};
+};
+
+&pfc {
 	ether_pins: ether {
 		groups = "gether_mii", "gether_int";
 		function = "gether";