net/sfc: support per-queue Rx RSS hash offload for EF100
net/sfc: support per-queue Rx RSS hash offload for EF100

Riverhead allows to choose Rx prefix (which contains RSS hash value
and valid flag) per queue.

Signed-off-by: Andrew Rybchenko <ac94ab2a8fe9a9a087f6e24dcbc16626b52c07e8@solarflare.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk