Fix spelling typo in comment.

Link: https://lkml.kernel.org/r/20220905061656.1829179-1-13667453960@163.comSigned-off-by: Jiangshan Yi <yijiangshan@kylinos.cn>
Reported-by: k2ci <kernel-bot@kylinos.cn>
Acked-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>