Merge branch 'add-l2-hw-acceleration-for-airoha_eth-driver'

Lorenzo Bianconi says:

====================
Add L2 hw acceleration for airoha_eth driver

Introduce the capability to offload L2 traffic defining flower rules in
the PSE/PPE engine available on EN7581 SoC.
Since the hw always reports L2/L3/L4 flower rules, link all L2 rules
sharing the same L2 info (with different L3/L4 info) in the L2 subflows
list of a given L2 PPE entry.

v1: https://lore.kernel.org/20250407-airoha-flowtable-l2b-v1-0-18777778e568@kernel.org
====================

Link: https://patch.msgid.link/20250409-airoha-flowtable-l2b-v2-0-4a1e3935ea92@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>