dt-bindings: ata: Convert fsl,pq-sata to YAML

Convert the Freescale PowerQUICC SATA controller binding from text form
to YAML. The list of compatible strings reflects current usage.

To clarify the description, I changed it to mention "each SATA
controller" instead of each port.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Acked-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: J. Neuschäfer <j.ne@posteo.net>
Link: https://lore.kernel.org/r/20250220-ppcyaml-ata-v3-1-5e727ab86247@posteo.net
Signed-off-by: Niklas Cassel <cassel@kernel.org>

Documentation/devicetree/bindings/ata/fsl,pq-sata.yaml

@@ -0,0 +1,60 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/ata/fsl,pq-sata.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale 8xxx/3.0 Gb/s SATA nodes
+
+maintainers:
+  - J. Neuschäfer <j.ne@posteo.net>
+
+description:
+  SATA nodes are defined to describe on-chip Serial ATA controllers.
+  Each SATA controller should have its own node.
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - fsl,mpc8377-sata
+              - fsl,mpc8536-sata
+              - fsl,mpc8315-sata
+              - fsl,mpc8379-sata
+          - const: fsl,pq-sata
+      - const: fsl,pq-sata-v2
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  cell-index:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [1, 2, 3, 4]
+    description: |
+      1 for controller @ 0x18000
+      2 for controller @ 0x19000
+      3 for controller @ 0x1a000
+      4 for controller @ 0x1b000
+
+required:
+  - compatible
+  - interrupts
+  - cell-index
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    sata@18000 {
+        compatible = "fsl,mpc8379-sata", "fsl,pq-sata";
+        reg = <0x18000 0x1000>;
+        cell-index = <1>;
+        interrupts = <44 IRQ_TYPE_LEVEL_LOW>;
+    };
+
+...