dt-bindings: rtc: Convert sa1100-rtc to json-schema

* Marvell Real Time Clock controller

Required properties:

- compatible: should be "mrvl,sa1100-rtc"

- reg: physical base address of the controller and length of memory mapped

  region.

- interrupts: Should be two. The first interrupt number is the rtc alarm

  interrupt and the second interrupt number is the rtc hz interrupt.

- interrupt-names: Assign name of irq resource.

Example:

	rtc: rtc@d4010000 {

		compatible = "mrvl,mmp-rtc";

		reg = <0xd4010000 0x1000>;

		interrupts = <5>, <6>;

		interrupt-names = "rtc 1Hz", "rtc alarm";

	};

# SPDX-License-Identifier: GPL-2.0-only

%YAML 1.2

---

$id: http://devicetree.org/schemas/rtc/sa1100-rtc.yaml#

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

title: Marvell Real Time Clock controller bindings

allOf:

  - $ref: rtc.yaml#

maintainers:

  - Alessandro Zummo <a.zummo@towertech.it>

  - Alexandre Belloni <alexandre.belloni@bootlin.com>

  - Rob Herring <robh+dt@kernel.org>

properties:

  compatible:

    enum:

      - mrvl,sa1100-rtc

      - mrvl,mmp-rtc

  reg:

    maxItems: 1

  clocks:

    maxItems: 1

  resets:

    maxItems: 1

  interrupts:

    minItems: 2

  interrupt-names:

    items:

      - const: 'rtc 1Hz'

      - const: 'rtc alarm'

required:

  - compatible

  - reg

  - interrupts

  - interrupt-names

additionalProperties: false

examples:

  - |

    rtc: rtc@d4010000 {

        compatible = "mrvl,mmp-rtc";

        reg = <0xd4010000 0x1000>;

        interrupts = <5>, <6>;

        interrupt-names = "rtc 1Hz", "rtc alarm";

    };

...