arm64: dts: ti: k3-am64: Add MIT license along with GPL-2.0

Modify license to include dual licensing as GPL-2.0-only OR MIT
license for SoC and TI evm device tree files. This allows for Linux
kernel device tree to be used in other Operating System ecosystems
such as Zephyr or FreeBSD.

While at this, update the GPL-2.0 to be GPL-2.0-only to be in sync
with latest SPDX conventions (GPL-2.0 is deprecated).

While at this, update the TI copyright year to sync with current year
to indicate license change (and add it at least for one file which was
missing TI copyright).

Cc: Christian Gmeiner <[e-mail]>
Cc: Krzysztof Kozlowski <[e-mail]>
Cc: Matthias Schiffer <[e-mail]>
Cc: Pierre Gondois <[e-mail]>
Cc: Roger Quadros <[e-mail]>
Cc: Tony Lindgren <[e-mail]>
Cc: Wadim Egorov <[e-mail]>

Acked-by: Christian Gmeiner <[e-mail]>
Acked-by: Krzysztof Kozlowski <[e-mail]>
Acked-by: Matthias Schiffer <[e-mail]>
Acked-by: Pierre Gondois <[e-mail]>
Acked-by: Roger Quadros <[e-mail]>
Acked-by: Tony Lindgren <[e-mail]>
Acked-by: Wadim Egorov <[e-mail]>
Signed-off-by: Nishanth Menon <[e-mail]>
Acked-by: Rob Herring <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Vignesh Raghavendra <[e-mail]>

arch/arm64/boot/dts/ti/k3-am64-main.dtsi

···
-// SPDX-License-Identifier: GPL-2.0
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
 /*
  * Device Tree Source for AM642 SoC Family Main Domain peripherals
  *
- * Copyright (C) 2020-2021 Texas Instruments Incorporated - https://www.ti.com/
+ * Copyright (C) 2020-2024 Texas Instruments Incorporated - https://www.ti.com/
  */
 
 #include <dt-bindings/phy/phy-cadence.h>

arch/arm64/boot/dts/ti/k3-am64-mcu.dtsi

···
-// SPDX-License-Identifier: GPL-2.0
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
 /*
  * Device Tree Source for AM64 SoC Family MCU Domain peripherals
  *
- * Copyright (C) 2020-2021 Texas Instruments Incorporated - https://www.ti.com/
+ * Copyright (C) 2020-2024 Texas Instruments Incorporated - https://www.ti.com/
  */
 
 &cbass_mcu {

arch/arm64/boot/dts/ti/k3-am64-thermal.dtsi

···
-// SPDX-License-Identifier: GPL-2.0
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
+/*
+ * Copyright (C) 2023-2024 Texas Instruments Incorporated - https://www.ti.com/
+ */
 
 #include <dt-bindings/thermal/thermal.h>
 

arch/arm64/boot/dts/ti/k3-am64.dtsi

···
-// SPDX-License-Identifier: GPL-2.0
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
 /*
  * Device Tree Source for AM642 SoC Family
  *
- * Copyright (C) 2020-2021 Texas Instruments Incorporated - https://www.ti.com/
+ * Copyright (C) 2020-2024 Texas Instruments Incorporated - https://www.ti.com/
  */
 
 #include <dt-bindings/gpio/gpio.h>

arch/arm64/boot/dts/ti/k3-am642-evm.dts

···
-// SPDX-License-Identifier: GPL-2.0
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
 /*
- * Copyright (C) 2020-2021 Texas Instruments Incorporated - https://www.ti.com/
+ * Copyright (C) 2020-2024 Texas Instruments Incorporated - https://www.ti.com/
  */
 
 /dts-v1/;

arch/arm64/boot/dts/ti/k3-am642-sk.dts

···
-// SPDX-License-Identifier: GPL-2.0
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
 /*
- * Copyright (C) 2021 Texas Instruments Incorporated - https://www.ti.com/
+ * Copyright (C) 2024 Texas Instruments Incorporated - https://www.ti.com/
  */
 
 /dts-v1/;

arch/arm64/boot/dts/ti/k3-am642.dtsi

···
-// SPDX-License-Identifier: GPL-2.0
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
 /*
  * Device Tree Source for AM642 SoC family in Dual core configuration
  *
- * Copyright (C) 2020-2021 Texas Instruments Incorporated - https://www.ti.com/
+ * Copyright (C) 2020-2024 Texas Instruments Incorporated - https://www.ti.com/
  */
 
 /dts-v1/;