The amount of parameters passed in and out between internal mlx5
create QP functions is too large to easily follow the flow. Change
it by grouping all create QP parameter into one structure.

Link: https://lore.kernel.org/r/20200427154636.381474-31-leon@kernel.orgReviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>