net: airoha: Add matchall filter offload support

net: airoha: Add matchall filter offload support

Introduce tc matchall filter offload support in airoha_eth driver.
Matchall hw filter is used to implement hw rate policing via tc action
police:

$tc qdisc add dev eth0 handle ffff: ingress
$tc filter add dev eth0 parent ffff: matchall action police \
 rate 100mbit burst 1000k drop

The current implementation supports just drop/accept as exceed/notexceed
actions. Moreover, rate and burst are the only supported configuration
parameters.

Reviewed-by: Davide Caratti <dcaratti@redhat.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20250415-airoha-hw-rx-ratelimit-v4-1-03458784fbc3@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>