dt-bindings: arm: Convert BCM2835 board/soc bindings to json-schema

Convert the BCM2835/6/7 SoC bindings to DT schema format using json-schema.
All the other Broadcom boards are maintained by Florian Fainelli.
Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Acked-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/arm/bcm/bcm2835.yaml

+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/bcm/bcm2835.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom BCM2711/BCM2835 Platforms Device Tree Bindings
+
+maintainers:
+  - Eric Anholt <eric@anholt.net>
+  - Stefan Wahren <wahrenst@gmx.net>
+
+properties:
+  $nodename:
+    const: '/'
+  compatible:
+    oneOf:
+      - description: BCM2835 based Boards
+        items:
+          - enum:
+              - raspberrypi,model-a
+              - raspberrypi,model-a-plus
+              - raspberrypi,model-b
+              - raspberrypi,model-b-i2c0  # Raspberry Pi Model B (no P5)
+              - raspberrypi,model-b-rev2
+              - raspberrypi,model-b-plus
+              - raspberrypi,compute-module
+              - raspberrypi,model-zero
+              - raspberrypi,model-zero-w
+          - const: brcm,bcm2835
+
+      - description: BCM2836 based Boards
+        items:
+          - enum:
+              - raspberrypi,2-model-b
+          - const: brcm,bcm2836
+
+      - description: BCM2837 based Boards
+        items:
+          - enum:
+              - raspberrypi,3-model-a-plus
+              - raspberrypi,3-model-b
+              - raspberrypi,3-model-b-plus
+              - raspberrypi,3-compute-module
+              - raspberrypi,3-compute-module-lite
+          - const: brcm,bcm2837
+
+...

Documentation/devicetree/bindings/arm/bcm/brcm,bcm2835.txt

-Broadcom BCM2835 device tree bindings
--------------------------------------------
-
-Raspberry Pi Model A
-Required root node properties:
-compatible = "raspberrypi,model-a", "brcm,bcm2835";
-
-Raspberry Pi Model A+
-Required root node properties:
-compatible = "raspberrypi,model-a-plus", "brcm,bcm2835";
-
-Raspberry Pi Model B
-Required root node properties:
-compatible = "raspberrypi,model-b", "brcm,bcm2835";
-
-Raspberry Pi Model B (no P5)
-early model B with I2C0 rather than I2C1 routed to the expansion header
-Required root node properties:
-compatible = "raspberrypi,model-b-i2c0", "brcm,bcm2835";
-
-Raspberry Pi Model B rev2
-Required root node properties:
-compatible = "raspberrypi,model-b-rev2", "brcm,bcm2835";
-
-Raspberry Pi Model B+
-Required root node properties:
-compatible = "raspberrypi,model-b-plus", "brcm,bcm2835";
-
-Raspberry Pi 2 Model B
-Required root node properties:
-compatible = "raspberrypi,2-model-b", "brcm,bcm2836";
-
-Raspberry Pi 3 Model A+
-Required root node properties:
-compatible = "raspberrypi,3-model-a-plus", "brcm,bcm2837";
-
-Raspberry Pi 3 Model B
-Required root node properties:
-compatible = "raspberrypi,3-model-b", "brcm,bcm2837";
-
-Raspberry Pi 3 Model B+
-Required root node properties:
-compatible = "raspberrypi,3-model-b-plus", "brcm,bcm2837";
-
-Raspberry Pi Compute Module
-Required root node properties:
-compatible = "raspberrypi,compute-module", "brcm,bcm2835";
-
-Raspberry Pi Compute Module 3
-Required root node properties:
-compatible = "raspberrypi,3-compute-module", "brcm,bcm2837";
-
-Raspberry Pi Compute Module 3 Lite
-Required root node properties:
-compatible = "raspberrypi,3-compute-module-lite", "brcm,bcm2837";
-
-Raspberry Pi Zero
-Required root node properties:
-compatible = "raspberrypi,model-zero", "brcm,bcm2835";
-
-Raspberry Pi Zero W
-Required root node properties:
-compatible = "raspberrypi,model-zero-w", "brcm,bcm2835";
-
-Generic BCM2835 board
-Required root node properties:
-compatible = "brcm,bcm2835";