dt-bindings: clock: rockchip: change SPDX-License-Identifier

Change SPDX-License-Identifier to (GPL-2.0+ OR MIT)
for Rockchip clock bindings.

Cc: Heiko Stübner <[e-mail]>
Cc: Elaine Zhang <[e-mail]>
Cc: Xing Zheng <[e-mail]>
Cc: Jeffy Chen <[e-mail]>
Cc: Finley Xiao <[e-mail]>
Cc: Andy Yan <[e-mail]>
Cc: Shawn Lin <[e-mail]>
Cc: Eric Engestrom <[e-mail]>
Cc: Mylène Josserand <[e-mail]>
Cc: Nícolas F. R. A. Prado <[e-mail]>
Signed-off-by: Johan Jonker <[e-mail]>
Acked-by: Eric Engestrom <[e-mail]>
Acked-by: Nícolas F. R. A. Prado <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
[Rockchip Ack/request for dual licensing dt-bindings at
https://lore.kernel.org/all/[e-mail]/]
Signed-off-by: Heiko Stuebner <[e-mail]>

Documentation/devicetree/bindings/clock/rockchip,px30-cru.yaml

···
-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: (GPL-2.0+ OR MIT)
 %YAML 1.2
 ---
 $id: http://devicetree.org/schemas/clock/rockchip,px30-cru.yaml#

Documentation/devicetree/bindings/clock/rockchip,rk3036-cru.yaml

···
-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: (GPL-2.0+ OR MIT)
 %YAML 1.2
 ---
 $id: http://devicetree.org/schemas/clock/rockchip,rk3036-cru.yaml#

Documentation/devicetree/bindings/clock/rockchip,rk3228-cru.yaml

···
-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: (GPL-2.0+ OR MIT)
 %YAML 1.2
 ---
 $id: http://devicetree.org/schemas/clock/rockchip,rk3228-cru.yaml#

Documentation/devicetree/bindings/clock/rockchip,rk3288-cru.yaml

···
-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: (GPL-2.0+ OR MIT)
 %YAML 1.2
 ---
 $id: http://devicetree.org/schemas/clock/rockchip,rk3288-cru.yaml#

Documentation/devicetree/bindings/clock/rockchip,rk3308-cru.yaml

···
-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: (GPL-2.0+ OR MIT)
 %YAML 1.2
 ---
 $id: http://devicetree.org/schemas/clock/rockchip,rk3308-cru.yaml#

Documentation/devicetree/bindings/clock/rockchip,rk3368-cru.yaml

···
-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: (GPL-2.0+ OR MIT)
 %YAML 1.2
 ---
 $id: http://devicetree.org/schemas/clock/rockchip,rk3368-cru.yaml#

Documentation/devicetree/bindings/clock/rockchip,rk3399-cru.yaml

···
-# SPDX-License-Identifier: GPL-2.0-only
+# SPDX-License-Identifier: (GPL-2.0+ OR MIT)
 %YAML 1.2
 ---
 $id: http://devicetree.org/schemas/clock/rockchip,rk3399-cru.yaml#

Documentation/devicetree/bindings/clock/rockchip,rv1108-cru.yaml

···
-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: (GPL-2.0+ OR MIT)
 %YAML 1.2
 ---
 $id: http://devicetree.org/schemas/clock/rockchip,rv1108-cru.yaml#