Revert "ext4: remove EXT4_STATE_DIOREAD_LOCK flag"

euler inclusion
category: perf
bugzilla: 12801
CVE: NA
---------------------------

This reverts commit 1d39834f.

Signed-off-by: yangerkun <yangerkun@huawei.coom>
Reviewed-by: Miao Xie <miaoxie@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>