io_uring: rename kiocb_end_write() local helper

[ Upstream commit a370167f ]

This helper does not take a kiocb as input and we want to create a
common helper by that name that takes a kiocb as input.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Message-Id: <20230817141337.1025891-2-amir73il@gmail.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Stable-dep-of: 1d60d74e ("io_uring/rw: fix missing NOWAIT check for O_DIRECT start write")
Signed-off-by: Sasha Levin <sashal@kernel.org>