RTE_ETH_RSS_IP support by Intel NIC drivers

[Morten Brørup]

Don't the Intel i40e and e1000 drivers support RSS on IP addresses [1]?
It looks like they do, but don't report it.

For i40e:
Accepted: 0x2288 FRAG_IPV4 NONFRAG_IPV4_OTHER FRAG_IPV6 NONFRAG_IPV6_OTHER
Unsupported: 0x8104 IPV4 IPV6 IPV6_EX

For e1000:
Accepted: 0x8104 IPV4 IPV6 IPV6_EX
Unsupported: 0x2288 FRAG_IPV4 NONFRAG_IPV4_OTHER FRAG_IPV6 NONFRAG_IPV6_OTHER

The RSS offload types [2] have no descriptions, so it's hard to guess which alternatives would be viable.

[1]: https://elixir.bootlin.com/dpdk/v25.03/source/lib/ethdev/rte_ethdev.h#L783
[2]: https://elixir.bootlin.com/dpdk/v25.03/source/lib/ethdev/rte_ethdev.h#L553

-Morten