arm64: dts: amd: use capital "OR" for multiple licenses in SPDX

Documentation/process/license-rules.rst and checkpatch expect the SPDX
identifier syntax for multiple licenses to use capital "OR".  Correct it
to keep consistent format and avoid copy-paste issues.

Link: https://lore.kernel.org/r/20240208105314.129095-1-krzysztof.kozlowski@linaro.orgSigned-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

arch/arm64/boot/dts/amd/elba-16core.dtsi

-// SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
 /*
  * Copyright 2020-2023 Advanced Micro Devices, Inc.
  */

arch/arm64/boot/dts/amd/elba-asic-common.dtsi

-// SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
 /*
  * Copyright 2020-2022 Advanced Micro Devices, Inc.
  */

arch/arm64/boot/dts/amd/elba-asic.dts

-// SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
 /*
  * Device Tree file for AMD Pensando Elba Board.
  *

arch/arm64/boot/dts/amd/elba-flash-parts.dtsi

-// SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
 /*
  * Copyright 2020-2023 Advanced Micro Devices, Inc.
  */

arch/arm64/boot/dts/amd/elba.dtsi

-// SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
 /*
  * Copyright 2020-2022 Advanced Micro Devices, Inc.
  */