Merge branch 'mlx5_dcs' into rdma.git for-next

Leon Romanovsky says:

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Add ConnectX DCS offload support

This patchset from Lior adds support of DCI stream channel (DCS) support.

DCS is an offload to SW load balancing of DC initiator work requests.

A single DC QP initiator (DCI) can be connected to only one target at the
time and can't start new connection until the previous work request is
completed.

This limitation causes to delays when the initiator process needs to
transfer data to multiple targets at the same time.
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* branch 'mlx5_dcs':
  RDMA/mlx5: Add DCS offload support
  RDMA/mlx5: Separate DCI QP creation logic
  net/mlx5: Add DCS caps & fields support