dt-bindings: display: convert sharp,ls043t1le01 to DT Schema

The txt binding specified the property "power-supply".
But the example and the actual implementation in the linux-kernel
uses "avdd-supply".
So the binding is adjusted to use avdd-supply as this seems
to be the correct choice.
There are no DT files in the linux kernel to check.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Cc: Werner Johansson <werner.johansson@sonymobile.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200408195109.32692-30-sam@ravnborg.org

Documentation/devicetree/bindings/display/panel/sharp,ls043t1le01.txt

-Sharp Microelectronics 4.3" qHD TFT LCD panel
-
-Required properties:
-- compatible: should be "sharp,ls043t1le01-qhd"
-- reg: DSI virtual channel of the peripheral
-- power-supply: phandle of the regulator that provides the supply voltage
-
-Optional properties:
-- backlight: phandle of the backlight device attached to the panel
-- reset-gpios: a GPIO spec for the reset pin
-
-Example:
-
-	mdss_dsi@fd922800 {
-		panel@0 {
-			compatible = "sharp,ls043t1le01-qhd";
-			reg = <0>;
-			avdd-supply = <&pm8941_l22>;
-			backlight = <&pm8941_wled>;
-			reset-gpios = <&pm8941_gpios 19 GPIO_ACTIVE_HIGH>;
-		};
-	};

Documentation/devicetree/bindings/display/panel/sharp,ls043t1le01.yaml

+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/sharp,ls043t1le01.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sharp Microelectronics 4.3" qHD TFT LCD panel
+
+maintainers:
+  - Werner Johansson <werner.johansson@sonymobile.com>
+
+allOf:
+  - $ref: panel-common.yaml#
+
+properties:
+  compatible:
+    const: sharp,ls043t1le01-qhd
+
+  reg: true
+  backlight: true
+  reset-gpios: true
+  port: true
+
+  avdd-supply:
+    description: handle of the regulator that provides the supply voltage
+
+required:
+  - compatible
+  - reg
+  - avdd-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    dsi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        panel@0 {
+            compatible = "sharp,ls043t1le01-qhd";
+            reg = <0>;
+            avdd-supply = <&pm8941_l22>;
+            backlight = <&pm8941_wled>;
+            reset-gpios = <&pm8941_gpios 19 GPIO_ACTIVE_HIGH>;
+        };
+    };
+
+...