FROMLIST v2 dt-bindings: bluetooth: qcom,wcn6750-bt: Document WCN6755 Bluetooth

Document the WCN6755 Bluetooth using a fallback to WCN6750 since the two
chips seem to be completely pin and software compatible. In fact the
original downstream kernel just pretends the WCN6755 is a WCN6750.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>

Documentation/devicetree/bindings/net/bluetooth/qcom,wcn6750-bt.yaml

@@ -12,8 +12,14 @@ maintainers:
 
 properties:
   compatible:
-    enum:
-      - qcom,wcn6750-bt
+    oneOf:
+      - items:
+          - enum:
+              - qcom,wcn6755-bt
+          - const: qcom,wcn6750-bt
+
+      - enum:
+          - qcom,wcn6750-bt
 
   enable-gpios:
     maxItems: 1