Merge branch 'mlxsw-spectrum-forward-packets-with-an-ipv4-link-local-source-ip'

Petr Machata says:

====================
mlxsw: spectrum: Forward packets with an IPv4 link-local source IP

By default, Spectrum devices do not forward IPv4 packets with a link-local
source IP (i.e., 169.254.0.0/16). This behavior does not align with the
kernel which does forward them. Fix the issue and add a selftest.
====================

Link: https://patch.msgid.link/cover.1755174341.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>