RDMA/nes: Fix max_qp_init_rd_atom returned from query device

In nes_query_device(), max_qp_init_rd_atom is incorrectly set to
max_qp_wr.  This was found when a test application had a dapl async
event error.

Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>