dt-bindings: ata: imx-pata: Convert to dtschema

Convert the imx-pata bindings to DT schema.
Add missing fsl,imx31-pata and fsl,imx51-pata compatibles during
conversion, because they are already being used in existing DTS.
Signed-off-by: Animesh Agarwal <animeshagarwal28@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>

Documentation/devicetree/bindings/ata/fsl,imx-pata.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/ata/fsl,imx-pata.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale i.MX PATA Controller
+
+maintainers:
+  - Animesh Agarwal <animeshagarwal28@gmail.com>
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - fsl,imx31-pata
+              - fsl,imx51-pata
+          - const: fsl,imx27-pata
+      - const: fsl,imx27-pata
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    items:
+      - description: PATA Controller interrupts
+
+  clocks:
+    items:
+      - description: PATA Controller clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    pata: pata@83fe0000 {
+        compatible = "fsl,imx51-pata", "fsl,imx27-pata";
+        reg = <0x83fe0000 0x4000>;
+        interrupts = <70>;
+        clocks = <&clks 161>;
+    };

Documentation/devicetree/bindings/ata/imx-pata.txt

-* Freescale i.MX PATA Controller
-
-Required properties:
-- compatible: "fsl,imx27-pata"
-- reg: Address range of the PATA Controller
-- interrupts: The interrupt of the PATA Controller
-- clocks: the clocks for the PATA Controller
-
-Example:
-
-	pata: pata@83fe0000 {
-		compatible = "fsl,imx51-pata", "fsl,imx27-pata";
-		reg = <0x83fe0000 0x4000>;
-		interrupts = <70>;
-		clocks = <&clks 161>;
-	};