From: Daeho Jeong <daehojeong@xxxxxxxxxx>
Need to use cow inode data content instead of the one in the original
inode, when we try to write the already updated atomic write files.
Fixes: 3db1de0e582c ("f2fs: change the current atomic write way")
Signed-off-by: Daeho Jeong <daehojeong@xxxxxxxxxx>