[PATCH] dt-binding: gpio: publish binding IDs under dual license

[Etienne Carriere <etienne.carriere@xxxxxxxxxx>]

Changes gpio.h DT binding header file to be published under GPLv2 or
BSD-3-Clause license terms. This change allows these GPIO generic
bindings header file to be used in software components as bootloaders
and OSes that are not published under GPLv2 terms.

All contributors to gpio.h file in copy.

Cc: Stephen Warren <swarren@xxxxxxxxxx>
Cc: Linus Walleij <linus.walleij@xxxxxxxxxx>
Cc: Laxman Dewangan <ldewangan@xxxxxxxxxx>
Cc: Charles Keepax <ckeepax@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Cc: Andrew Jeffery <andrew@xxxxxxxx>
Cc: Thomas Petazzoni <thomas.petazzoni@xxxxxxxxxxx>
Cc: Nuno Sá <nuno.sa@xxxxxxxxxx>
Cc: Bartosz Golaszewski <brgl@xxxxxxxx>
Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@xxxxxxxxxx>

Signed-off-by: Etienne Carriere <etienne.carriere@xxxxxxxxxx>
---
 include/dt-bindings/gpio/gpio.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/dt-bindings/gpio/gpio.h b/include/dt-bindings/gpio/gpio.h
index 5566e58196a2..f8df7511b8b4 100644
--- a/include/dt-bindings/gpio/gpio.h
+++ b/include/dt-bindings/gpio/gpio.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
 /*
  * This header provides constants for most GPIO bindings.
  *
-- 
2.25.1