RDMA/hfi1: Remove hfi1_create_qp declaration

The function isn't implemented - delete the declaration.

Link: https://lore.kernel.org/r/20200622094709.12981-1-kamalheib1@gmail.com


Signed-off-by: Kamal Heib <kamalheib1@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>