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 <heiko@sntech.de>
Cc: Elaine Zhang <zhangqing@rock-chips.com>
Cc: Xing Zheng <zhengxing@rock-chips.com>
Cc: Jeffy Chen <jeffy.chen@rock-chips.com>
Cc: Finley Xiao <finley.xiao@rock-chips.com>
Cc: Andy Yan <andy.yan@rock-chips.com>
Cc: Shawn Lin <shawn.lin@rock-chips.com>
Cc: Eric Engestrom <eric@engestrom.ch>
Cc: Mylène Josserand <mylene.josserand@collabora.com>
Cc: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Acked-by: Eric Engestrom <eric@engestrom.ch>
Acked-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Link: https://lore.kernel.org/r/20c6a502-2ff5-bdb1-fb4f-0741f3a2c19c@gmail.com
[Rockchip Ack/request for dual licensing dt-bindings at
 https://lore.kernel.org/all/510d1180-bc8e-7820-c772-ed7f35447087@rock-chips.com/]
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

Author: Johan Jonker

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

@@ -1,4 +1,4 @@
-# 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

@@ -1,4 +1,4 @@
-# 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

@@ -1,4 +1,4 @@
-# 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

@@ -1,4 +1,4 @@
-# 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

@@ -1,4 +1,4 @@
-# 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

@@ -1,4 +1,4 @@
-# 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

@@ -1,4 +1,4 @@
-# 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

@@ -1,4 +1,4 @@
-# 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#