dt-bindings: arm64: bcmbca: Merge BCM4908 into BCMBCA

BCM4908 is one of the Broadcom Broadband origin WLAN Router/Access
Pointer SoCs. It was originally added by Rafał before Broadcom
started to upstream the support for broadband SoCs. Now that Broadcom
Broadband SoC is supported under arch ARCH_BCMBCA, this patch moves
BCM4908 SoC device tree descriptions into BCMBCA binding.
Signed-off-by: William Zhang <william.zhang@broadcom.com>
Acked-by: Rafał Miłecki <rafal@milecki.pl>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220803175455.47638-2-william.zhang@broadcom.comSigned-off-by: Florian Fainelli <f.fainelli@gmail.com>

Documentation/devicetree/bindings/arm/bcm/brcm,bcm4908.yaml

-# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
-%YAML 1.2
----
-$id: http://devicetree.org/schemas/arm/bcm/brcm,bcm4908.yaml#
-$schema: http://devicetree.org/meta-schemas/core.yaml#
-
-title: Broadcom BCM4908 device tree bindings
-
-description:
-  Broadcom BCM4906 / BCM4908 / BCM49408 Wi-Fi/network SoCs with Brahma CPUs.
-
-maintainers:
-  - Rafał Miłecki <rafal@milecki.pl>
-
-properties:
-  $nodename:
-    const: '/'
-  compatible:
-    oneOf:
-      - description: BCM4906 based boards
-        items:
-          - enum:
-              - netgear,r8000p
-              - tplink,archer-c2300-v1
-          - const: brcm,bcm4906
-          - const: brcm,bcm4908
-
-      - description: BCM4908 based boards
-        items:
-          - enum:
-              - asus,gt-ac5300
-              - netgear,raxe500
-          - const: brcm,bcm4908
-
-      - description: BCM49408 based boards
-        items:
-          - const: brcm,bcm49408
-          - const: brcm,bcm4908
-
-additionalProperties: true
-
-...

Documentation/devicetree/bindings/arm/bcm/brcm,bcmbca.yaml

@@ -15,6 +15,7 @@ maintainers:
   - William Zhang <william.zhang@broadcom.com>
   - Anand Gore <anand.gore@broadcom.com>
   - Kursad Oney <kursad.oney@broadcom.com>
+  - Rafał Miłecki <rafal@milecki.pl>
 
 properties:
   $nodename:
@@ -28,6 +29,26 @@ properties:
           - const: brcm,bcm47622
           - const: brcm,bcmbca
 
+      - description: BCM4906 based boards
+        items:
+          - enum:
+              - netgear,r8000p
+              - tplink,archer-c2300-v1
+          - const: brcm,bcm4906
+          - const: brcm,bcm4908
+
+      - description: BCM4908 based boards
+        items:
+          - enum:
+              - asus,gt-ac5300
+              - netgear,raxe500
+          - const: brcm,bcm4908
+
+      - description: BCM49408 based boards
+        items:
+          - const: brcm,bcm49408
+          - const: brcm,bcm4908
+
       - description: BCM4912 based boards
         items:
           - enum: