pinctrl: 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.

Correct also the placement of SPDX identifier in pinctrl-meson-axg
files:

  WARNING: Misplaced SPDX-License-Identifier tag - use line 1 instead

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20230823085546.116494-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/meson/pinctrl-meson-axg-pmx.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
 /*
  * Second generation of pinmux driver for Amlogic Meson-AXG SoC.
  *
@@ -6,8 +7,6 @@
  *
  * Copyright (c) 2017 Amlogic, Inc. All rights reserved.
  * Author: Xingyu Chen <xingyu.chen@amlogic.com>
- *
- * SPDX-License-Identifier: (GPL-2.0+ or MIT)
  */
 
 /*

drivers/pinctrl/meson/pinctrl-meson-axg-pmx.h

@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: (GPL-2.0+ or MIT) */
+/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
 /*
  * Copyright (c) 2017 Baylibre SAS.
  * Author:  Jerome Brunet  <jbrunet@baylibre.com>

drivers/pinctrl/meson/pinctrl-meson-axg.c

@@ -1,10 +1,9 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
 /*
  * Pin controller and GPIO driver for Amlogic Meson AXG SoC.
  *
  * Copyright (c) 2017 Amlogic, Inc. All rights reserved.
  * Author: Xingyu Chen <xingyu.chen@amlogic.com>
- *
- * SPDX-License-Identifier: (GPL-2.0+ or MIT)
  */
 
 #include <dt-bindings/gpio/meson-axg-gpio.h>

drivers/pinctrl/meson/pinctrl-meson-g12a.c

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: (GPL-2.0+ or MIT)
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
 /*
  * Pin controller and GPIO driver for Amlogic Meson G12A SoC.
  *

drivers/pinctrl/pinctrl-mlxbf3.c

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0-only or BSD-3-Clause
+// SPDX-License-Identifier: GPL-2.0-only OR BSD-3-Clause
 /* Copyright (C) 2022 NVIDIA CORPORATION & AFFILIATES */
 
 #include <linux/bitfield.h>