Merge branch 'clean-devlink-net-namespace-operations'

Leon Romanovsky says:

====================
Clean devlink net namespace operations

This short series continues my work on devlink core code to make devlink
reload less prone to errors and harden it from API abuse.

Despite first patch being a clear fix, I would ask you to apply it to
net-next anyway, because the fixed patch is anyway old and it will
help us to eliminate merge conflicts that will arise for following
patches or even for the second one.
====================

Link: https://lore.kernel.org/r/cover.1627578998.git.leonro@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>