io_uring: inline __io_req_complete_put()

io_uring: inline __io_req_complete_put()

[ Upstream commit fa18fa2272c7469e470dcb7bf838ea50a25494ca ]

Inline __io_req_complete_put() into io_req_complete_post(), there are no
other users.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/1923a4dfe80fa877f859a22ed3df2d5fc8ecf02b.1669203009.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Stable-dep-of: ef5c600adb1d ("io_uring: always prep_async for drain requests")
Signed-off-by: Sasha Levin <sashal@kernel.org>