dt-bindings: display: panel: add startek kd070fhfid015 support

The Startek KD070FHFID015 is a 7-inch TFT LCD display with a resolution
of 1024 x 600 pixels.
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Alexandre Mergnat <amergnat@baylibre.com>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230711-startek_display-v4-1-fb1d53bfdef6@baylibre.com

Documentation/devicetree/bindings/display/panel/startek,kd070fhfid015.yaml

+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/startek,kd070fhfid015.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Startek Electronic Technology Co. kd070fhfid015 7 inch TFT LCD panel
+
+maintainers:
+  - Alexandre Mergnat <amergnat@baylibre.com>
+
+allOf:
+  - $ref: panel-common.yaml#
+
+properties:
+  compatible:
+    const: startek,kd070fhfid015
+
+  enable-gpios: true
+
+  iovcc-supply:
+    description: Reference to the regulator powering the panel IO pins.
+
+  reg:
+    maxItems: 1
+    description: DSI virtual channel
+
+  reset-gpios: true
+
+  port: true
+
+  power-supply: true
+
+additionalProperties: false
+
+required:
+  - compatible
+  - enable-gpios
+  - iovcc-supply
+  - reg
+  - reset-gpios
+  - port
+  - power-supply
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    dsi0 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        panel@0 {
+            compatible = "startek,kd070fhfid015";
+            reg = <0>;
+            enable-gpios = <&pio 67 GPIO_ACTIVE_HIGH>;
+            reset-gpios = <&pio 20 GPIO_ACTIVE_HIGH>;
+            iovcc-supply = <&mt6357_vsim1_reg>;
+            power-supply = <&vsys_lcm_reg>;
+
+            port {
+                panel_in: endpoint {
+                    remote-endpoint = <&dsi_out>;
+                };
+            };
+        };
+    };
+
+...