RDMA/rxe: Fix the error "trying to register non-static key in rxe_cleanup_task"

In the Linux kernel, the following vulnerability has been resolved:

RDMA/rxe: Fix the error "trying to register non-static key in rxe_cleanup_task"

In the function rxe_create_qp(), rxe_qp_from_init() is called to

initialize qp, internally things like rxe_init_task are not setup until

rxe_qp_init_req().

If an error occurred before this point then the unwind will call

rxe_cleanup() and eventually to rxe_qp_do_cleanup()/rxe_cleanup_task()

which will oops when trying to access the uninitialized spinlock.

If rxe_init_task is not executed, rxe_cleanup_task will not be called.