RDMA/cxgb4: Set queue pair state when being queried

The API for ib_query_qp requires the driver to set cur_qp_state on return,
add the missing set.

Fixes: 67bbc055 ("RDMA/cxgb4: Add query_qp support")
Link: https://lore.kernel.org/r/20211220152530.60399-1-kamalheib1@gmail.com


Signed-off-by: Kamal Heib <kamalheib1@gmail.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>