dt-bindings: display: samsung,exynos-hdmi-ddc: convert to dtschema

Convert the Exynos HDMI DDC bindings to DT schema format.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220208171823.226211-7-krzysztof.kozlowski@canonical.com

Documentation/devicetree/bindings/display/exynos/exynos_hdmiddc.txt

-Device-Tree bindings for hdmiddc driver
-
-Required properties:
-- compatible: value should be one of the following
-	1) "samsung,exynos5-hdmiddc" <DEPRECATED>
-	2) "samsung,exynos4210-hdmiddc"
-
-- reg: I2C address of the hdmiddc device.
-
-Example:
-
-	hdmiddc {
-		compatible = "samsung,exynos4210-hdmiddc";
-		reg = <0x50>;
-	};

Documentation/devicetree/bindings/display/samsung/samsung,exynos-hdmi-ddc.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/samsung/samsung,exynos-hdmi-ddc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Samsung Exynos SoC HDMI DDC
+
+maintainers:
+  - Inki Dae <inki.dae@samsung.com>
+  - Joonyoung Shim <jy0922.shim@samsung.com>
+  - Seung-Woo Kim <sw0312.kim@samsung.com>
+  - Kyungmin Park <kyungmin.park@samsung.com>
+  - Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+
+properties:
+  compatible:
+    oneOf:
+      - const: samsung,exynos4210-hdmiddc
+      - const: samsung,exynos5-hdmiddc
+        deprecated: true
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        ddc@50 {
+            compatible = "samsung,exynos4210-hdmiddc";
+            reg = <0x50>;
+        };
+    };