dt-bindings: phy: samsung,dp-video-phy: convert to dtschema

Convert the Samsung SoC DisplayPort PHY bindings to DT schema format.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220129193646.372481-4-krzysztof.kozlowski@canonical.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

Documentation/devicetree/bindings/phy/samsung,dp-video-phy.yaml

+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/samsung,dp-video-phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Samsung Exynos SoC DisplayPort PHY
+
+maintainers:
+  - Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+  - Marek Szyprowski <m.szyprowski@samsung.com>
+  - Sylwester Nawrocki <s.nawrocki@samsung.com>
+
+properties:
+  compatible:
+    enum:
+      - samsung,exynos5250-dp-video-phy
+      - samsung,exynos5420-dp-video-phy
+
+  "#phy-cells":
+    const: 0
+
+  samsung,pmu-syscon:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      Phandle to PMU system controller interface.
+
+required:
+  - compatible
+  - "#phy-cells"
+  - samsung,pmu-syscon
+
+additionalProperties: false
+
+examples:
+  - |
+    phy {
+        compatible = "samsung,exynos5420-dp-video-phy";
+        samsung,pmu-syscon = <&pmu_system_controller>;
+        #phy-cells = <0>;
+    };

Documentation/devicetree/bindings/phy/samsung-phy.txt

-Samsung Exynos SoC series Display Port PHY
--------------------------------------------------
-
-Required properties:
-- compatible : should be one of the following supported values:
-	 - "samsung,exynos5250-dp-video-phy"
-	 - "samsung,exynos5420-dp-video-phy"
-- samsung,pmu-syscon: phandle for PMU system controller interface, used to
-		      control pmu registers for power isolation.
-- #phy-cells : from the generic PHY bindings, must be 0;
-
 Samsung S5P/Exynos SoC series USB PHY
 -------------------------------------------------