RDMA/cma: Get rid of 1 bit boolean

Arrange fields of cma_req_info structure for efficiency on
stack and get rid of one bit boolean field.

Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>