net: rds: Simplify the allocation of slab caches in rds_conn_init

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/20240124075801.471330-1-chentao@kylinos.cnSigned-off-by: Jakub Kicinski <kuba@kernel.org>

net/rds/connection.c

@@ -829,9 +829,7 @@ int rds_conn_init(void)
 	if (ret)
 		return ret;
 
-	rds_conn_slab = kmem_cache_create("rds_connection",
-					  sizeof(struct rds_connection),
-					  0, 0, NULL);
+	rds_conn_slab = KMEM_CACHE(rds_connection, 0);
 	if (!rds_conn_slab) {
 		rds_loop_net_exit();
 		return -ENOMEM;