If the source tree happens to contain a kernel module as an example, a
test or under a "contrib" directory then we shouldn't be picking it up
and making the determination that the entire thing is a kernel module.
An example that triggered this is zstd, which ships a kernel module
under contrib/linux-kernel:
https://github.com/facebook/zstd
(From OE-Core rev: c2b3154158d4bb0855daa56477393341139d4cf9)
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
e9bb56067a