Merge branch 'selftests-net-Fix-clang-warnings-on-powerpc'

Tanner Love says:

====================
selftests/net: Fix clang warnings on powerpc

This is essentially a v2 of
http://patchwork.ozlabs.org/project/netdev/patch/20200724181757.2331172-1-tannerlove.kernel@gmail.com/

,
but it has been split up in order to have only one "Fixes" tag per
patch.
====================

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