Merge branch 'mctp-kunit-tests'

Jeremy Kerr says:

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MCTP kunit tests

This change adds some initial kunit tests for the MCTP core. We'll
expand the coverage in a future series, and augment with a few
selftests, but this establishes a baseline set of tests for now.

Thanks to the kunit folks for the framework!
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Signed-off-by: David S. Miller <davem@davemloft.net>