dt-bindings: net: bluetooth: nxp: Add firmware-name property

This adds a new optional device tree property called firware-name.
Signed-off-by: Neeraj Sanjay Kale <neeraj.sanjaykale@nxp.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

Documentation/devicetree/bindings/net/bluetooth/nxp,88w8987-bt.yaml

@@ -31,6 +31,9 @@ properties:
       This property depends on the module vendor's
       configuration.
 
+  firmware-name:
+    maxItems: 1
+
 required:
   - compatible
 
@@ -42,5 +45,6 @@ examples:
         bluetooth {
             compatible = "nxp,88w8987-bt";
             fw-init-baudrate = <3000000>;
+            firmware-name = "uartuart8987_bt_v0.bin";
         };
     };