dt-bindings: serial: qca,ar9330-uart: Convert to json-schema

* Qualcomm Atheros AR9330 High-Speed UART

Required properties:

- compatible: Must be "qca,ar9330-uart"

- reg: Specifies the physical base address of the controller and

  the length of the memory mapped region.

- interrupts: Specifies the interrupt source of the parent interrupt

  controller. The format of the interrupt specifier depends on the

  parent interrupt controller.

Additional requirements:

  Each UART port must have an alias correctly numbered in "aliases"

  node.

Example:

	aliases {

		serial0 = &uart0;

	};

	uart0: uart@18020000 {

		compatible = "qca,ar9330-uart";

		reg = <0x18020000 0x14>;

		interrupt-parent = <&intc>;

		interrupts = <3>;

	};

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/serial/qca,ar9330-uart.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Qualcomm Atheros AR9330 High-Speed UART

maintainers:

  - Oleksij Rempel <o.rempel@pengutronix.de>

allOf:

  - $ref: /schemas/serial.yaml#

properties:

  compatible:

    const: qca,ar9330-uart

  reg:

    maxItems: 1

  interrupts:

    maxItems: 1

  clocks:

    maxItems: 1

  clock-names:

    const: uart

required:

  - compatible

  - reg

  - interrupts

  - clocks

  - clock-names

additionalProperties: false

examples:

  - |

    serial@18020000 {

      compatible = "qca,ar9330-uart";

      reg = <0x18020000 0x14>;

      clocks = <&ref>;

      clock-names = "uart";

      interrupt-parent = <&intc>;

      interrupts = <3>;

    };

...