Doc/DT: Add DT binding documentation for TPO td043mtea1 panel

Add DT binding documentation for TPO td043mtea1 panel
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: devicetree@vger.kernel.org
Cc: Grazvydas Ignotas <notasas@gmail.com>

Documentation/devicetree/bindings/video/tpo,td043mtea1.txt

+TPO TD043MTEA1 Panel
+====================
+
+Required properties:
+- compatible: "tpo,td043mtea1"
+- reset-gpios: panel reset gpio
+
+Optional properties:
+- label: a symbolic name for the panel
+
+Required nodes:
+- Video port for DPI input
+
+Example
+-------
+
+lcd-panel: panel@0 {
+	compatible = "tpo,td043mtea1";
+	reg = <0>;
+	spi-max-frequency = <100000>;
+	spi-cpol;
+	spi-cpha;
+
+	label = "lcd";
+
+	reset-gpios = <&gpio7 7 0>;
+
+	port {
+		lcd_in: endpoint {
+			remote-endpoint = <&dpi_out>;
+		};
+	};
+};