media: platform: 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.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/media/platform/verisilicon/rockchip_av1_filmgrain.c

-// SPDX-License-Identifier: GPL-2.0-only or Apache-2.0
+// SPDX-License-Identifier: GPL-2.0-only OR Apache-2.0
 
 #include "rockchip_av1_filmgrain.h"