io_uring: add new line after variable declaration

Fixes checkpatch warning

Signed-off-by: Anuj Gupta <anuj20.g@samsung.com>
Link: https://lore.kernel.org/r/20240902062134.136387-2-anuj20.g@samsung.com


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