dt-bindings: net: dp83869: Update licensing info

Add BSD 2 Clause to the licensing.

CC: Rob Herring <[e-mail]>
Signed-off-by: Dan Murphy <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

Documentation/devicetree/bindings/net/ti,dp83869.yaml

···
-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: (GPL-2.0+ OR BSD-2-Clause)
 # Copyright (C) 2019 Texas Instruments Incorporated
 %YAML 1.2
 ---