dt-bindings: net: Add generic wireless controller

Wireless controllers share the common properties.

Reviewed-by: Rob Herring (Arm) <[e-mail]>
Signed-off-by: David Heidelberg <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Johannes Berg <[e-mail]>

Documentation/devicetree/bindings/net/wireless/wireless-controller.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/wireless/wireless-controller.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Wireless Controller Common Properties
+
+maintainers:
+  - Lorenzo Bianconi <[e-mail]>
+
+properties:
+  $nodename:
+    pattern: "^wifi(@.*)?$"
+
+allOf:
+  - $ref: ieee80211.yaml#
+  - $ref: /schemas/net/network-class.yaml#
+
+additionalProperties: true
+
+...
+