Merge branch 'tsnep-napi-fixes'

Gerhard Engleder says:

====================
tsnep: Fixes based on napi.rst

Based on the documentation networking/napi.rst some fixes have been
done. tsnep driver should be in line with this new documentation after
these fixes.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>