mkfs.f2fs: update allocation policy for ro feature

Update allocation policy for ro feature:
- hot_data: allocating blocks by LBA ascending order
- hot_node: allocating blocks by LBA descending order

Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
3 files changed