Merge branch 'selftests-netdevsim-add-devlink-paramstests'

Jiri Pirko says:

====================
selftests: netdevsim: add devlink paramstests

The first patch is just a helper addition as a dependency of the actual
test in patch number two.
====================

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