ext4: Move marking of handle as sync to ext4_add_nondir()

mainline inclusion
from mainline-5.5-rc1
commit a9e26328
category: bugfix
bugzilla: 25031
CVE: NA
---------------------------

Every caller of ext4_add_nondir() marks handle as sync if directory has
DIRSYNC set. Move this marking to ext4_add_nondir() so reduce some
duplication.

Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20191105164437.32602-4-jack@suse.cz


Signed-off-by: Theodore Ts'o <tytso@mit.edu>

Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Reviewed-by: Yang Erkun <yangerkun@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>