RDMA/rxe: Convert tasklet args to queue pairs

RDMA/rxe: Convert tasklet args to queue pairs

[ Upstream commit 3946fc2a42b18cf0b675121158a2625825ce27b5 ]

Originally is was thought that the tasklet machinery in rxe_task.c would
be used in other applications but that has not happened for years. This
patch replaces the 'void *arg' by struct 'rxe_qp *qp' in the parameters to
the tasklet calls. This change will have no affect on performance but may
make the code a little clearer.

Link: https://lore.kernel.org/r/20230304174533.11296-2-rpearsonhpe@gmail.com
Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Stable-dep-of: b2b1ddc45745 ("RDMA/rxe: Fix the error "trying to register non-static key in rxe_cleanup_task"")
Signed-off-by: Sasha Levin <sashal@kernel.org>