dt-bindings: net: marvell-bluetooth: Convert txt bindings to yaml

Convert documentation for The Marvell Avastar 88W8897 into YAML syntax.

Signed-off-by: David Heidelberg <david@ixit.cz>
Link: https://lore.kernel.org/r/20211009104716.46162-1-david@ixit.cz
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/net/marvell-bluetooth.yaml

@@ -0,0 +1,31 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/net/marvell-bluetooth.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Marvell Bluetooth chips
+
+description: |
+  This documents the binding structure and common properties for serial
+  attached Marvell Bluetooth devices.
+
+maintainers:
+  - Rob Herring <robh@kernel.org>
+
+properties:
+  compatible:
+    const: mrvl,88w8897
+
+required:
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+    serial {
+      bluetooth {
+        compatible = "mrvl,88w8897";
+      };
+    };