io_uring/rsrc: refactor io_queue_rsrc_removal

We can queue up a rsrc into a list in io_queue_rsrc_removal() while
allocating io_rsrc_put and so simplify the function.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/36bd708ee25c0e2e7992dc19b17db166eea9ac40.1681395792.git.asml.silence@gmail.com


Signed-off-by: Jens Axboe <axboe@kernel.dk>