ext4: use ext4_buffer_uptodate() in __ext4_get_inode_loc()

mainline inclusion
from mainline-5.10-rc1
commit 60c776e5
category: bugfix
bugzilla: 51832
CVE: NA
---------------------------

We have already introduced ext4_buffer_uptodate() to re-set the uptodate
bit on buffer which has been failed to write out to disk. Just remove
the redundant codes and switch to use ext4_buffer_uptodate() in
__ext4_get_inode_loc().

Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Link: https://lore.kernel.org/r/20200924073337.861472-5-yi.zhang@huawei.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: yangerkun <yangerkun@huawei.com>
Reviewed-by: zhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>