dt-bindings: display: convert startek,startek-kd050c to DT Schema

Signed-off-by: Sam Ravnborg <[e-mail]>
Reviewed-by: Rob Herring <[e-mail]>
Cc: Marek Belisko <[e-mail]>
Cc: Thierry Reding <[e-mail]>
Cc: Sam Ravnborg <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

Documentation/devicetree/bindings/display/panel/startek,startek-kd050c.txt

···
-Startek Electronic Technology Co. KD050C 5.0" WVGA TFT LCD panel
-
-Required properties:
-- compatible: should be "startek,startek-kd050c"

Documentation/devicetree/bindings/display/panel/startek,startek-kd050c.yaml

···
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/startek,startek-kd050c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Startek Electronic Technology Co. KD050C 5.0" WVGA TFT LCD panel
+
+maintainers:
+  - Nikita Kiryanov <[e-mail]>
+
+allOf:
+  - $ref: panel-dpi.yaml#
+
+properties:
+  compatible:
+    items:
+      - const: startek,startek-kd050c
+      - {} # panel-dpi, but not listed here to avoid false select
+
+  backlight: true
+  enable-gpios: true
+  height-mm: true
+  label: true
+  panel-timing: true
+  port: true
+  power-supply: true
+  reset-gpios: true
+  width-mm: true
+
+additionalProperties: false
+
+...