dt-bindings: arm: bcm: Convert Vulcan to YAML

Broadcom Vulcan device tree bindings

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Boards with Broadcom Vulcan shall have the following root property:

Broadcom Vulcan Evaluation Board:

  compatible = "brcm,vulcan-eval", "brcm,vulcan-soc";

Generic Vulcan board:

  compatible = "brcm,vulcan-soc";

# SPDX-License-Identifier: GPL-2.0

%YAML 1.2

---

$id: http://devicetree.org/schemas/arm/bcm/brcm,vulcan-soc.yaml#

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

title: Broadcom Vulcan device tree bindings

maintainers:

  - Robert Richter <rrichter@marvell.com>

properties:

  $nodename:

    const: '/'

  compatible:

    items:

      - enum:

        - brcm,vulcan-eval

        - cavium,thunderx2-cn9900

      - const: brcm,vulcan-soc

...