mm/memcg: fix wrong function name above obj_cgroup_charge_zswap()

The correct function name is obj_cgroup_may_zswap(). Correct the comment.

Link: https://lkml.kernel.org/r/20230803120021.762279-1-linmiaohe@huawei.comSigned-off-by: Miaohe Lin <linmiaohe@huawei.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

mm/memcontrol.c

@@ -7777,7 +7777,7 @@ bool obj_cgroup_may_zswap(struct obj_cgroup *objcg)
  * @objcg: the object cgroup
  * @size: size of compressed object
  *
- * This forces the charge after obj_cgroup_may_swap() allowed
+ * This forces the charge after obj_cgroup_may_zswap() allowed
  * compression and storage in zwap for this cgroup to go ahead.
  */
 void obj_cgroup_charge_zswap(struct obj_cgroup *objcg, size_t size)