airoha: Improve LRO performances

airoha: Improve LRO performances

Add hardware TCP Large Receive Offload (LRO) support to the airoha_eth
driver, leveraging the EN7581/AN7583 SoC's 8 dedicated LRO hardware queues
mapped to RX queues 24–31. LRO hw offloading does not support
Scatter-Gather (SG) so it is required to increase the page_pool allocation
order to 2 for RX queues 24–31 (LRO queues).

Performance comparison between GRO and hw LRO has been carried out using
a 10Gbps NIC:

GRO: ~2.7 Gbps
LRO: ~8.1 Gbps

Tested-by: Madhur Agrawal <madhur.agrawal@airoha.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://github.com/openwrt/openwrt/pull/23530
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>