Merge branch 'mlxsw-preparations-for-nexthop-objects-support-part-2-2'

Ido Schimmel says:

====================
mlxsw: Preparations for nexthop objects support - part 2/2

This patch set contains the second round of preparations towards nexthop
objects support in mlxsw. Follow up patches can be found here [1].

The patches are mostly small and trivial and contain non-functional
changes aimed at making it easier to integrate nexthop objects with
mlxsw.

Patch #1 is a fix for an issue introduced in previous submission. Found
by Coverity.

[1] https://github.com/idosch/linux/tree/submit/nexthop_objects
====================

Link: https://lore.kernel.org/r/20201117174704.291990-1-idosch@idosch.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>