char: misc: Move drivers/misc/misc_minor_kunit.c to drivers/char/
drivers/misc/misc_minor_kunit.c is to test APIs defined in
drivers/char/misc.c, but is not in the same directory as the later.
Move misc_minor_kunit.c to drivers/char/.
Signed-off-by: Zijun Hu <zijun.hu@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250714-rfc_miscdev-v6-1-2ed949665bde@oss.qualcomm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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