Merge branch 'selftests-drv-net-add-vlan-test'

Ovidiu Panait says:

====================
selftests: drv-net: Add VLAN test

This series adds a selftest that pings over 802.1q, 802.1ad and
QinQ VLAN interfaces with RX VLAN stripping offloads enabled
and disabled.

This series contains only the selftest part of [1].

[1] https://lore.kernel.org/20260908164309.59282-1-ovidiu.panait.rb@renesas.com
====================

Link: https://patch.msgid.link/20260918112529.96039-1-ovidiu.panait.rb@renesas.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>