Revert "add barriers to buffer_uptodate and set_buffer_uptodate"

hulk inclusion
category: performance
bugzilla: https://gitee.com/openeuler/kernel/issues/I65DCK


CVE: NA

-------------------------------

This reverts commit 372370dc.

There's no evidence that buffer_uptodate and set_buffer_uptodate are
unreliable without barriers. What's more, this patch result in the
performance deterioration.

Signed-off-by: Li Lingfeng <lilingfeng3@huawei.com>
Reviewed-by: Yang Erkun <yangerkun@huawei.com>
Reviewed-by: Zhang Yi <yi.zhang@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>