f2fs: report delalloc reserve as non-free in statfs for project quota
This reserved space isn't committed yet but cannot be used for
allocations. For userspace it has no difference from used space.
See the same fix in ext4 commit
f06925c73942 ("ext4: report delalloc
reserve as non-free in statfs for project quota").
Fixes: ddc34e328d06 ("f2fs: introduce f2fs_statfs_project")
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>