checkpatch: suppress strscpy warnings for userspace tools

The checkpatch.pl script currently warns against the use of strcpy,
strlcpy, and strncpy, recommending strscpy as a safer alternative. 
However, these warnings are also triggered for code under tools/ and
scripts/, which are userspace utilities where strscpy is not available. 
This patch suppresses these warnings for files in tools/ and scripts/.

Link: https://lkml.kernel.org/r/20250923171722.7798-1-suchitkarunakaran@gmail.com


Signed-off-by: Suchit Karunakaran <suchitkarunakaran@gmail.com>
Acked-by: Joe Perches <joe@perches.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Dwaipayan Ray <dwaipayanray1@gmail.com>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>