io_uring: Simplify the allocation of slab caches

commit 0a31bd5f

 ("KMEM_CACHE(): simplify slab cache creation")
introduces a new macro.
Use the new KMEM_CACHE() macro instead of direct kmem_cache_create
to simplify the creation of SLAB caches.

Signed-off-by: Kunwu Chan <chentao@kylinos.cn>
Link: https://lore.kernel.org/r/20240130100247.81460-1-chentao@kylinos.cn


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