Like pci and virtio, we add a rdma helper for affinity
spreading. This achieves optimal mq affinity assignments
according to the underlying rdma device affinity maps.
Reviewed-by: Jens Axboe
Reviewed-by: Christoph Hellwig
Reviewed-by: Max Gurtovoy
Signed-off-by: Sagi Grimberg
Signed-off-by: Doug Ledford