mkfs.f2fs: introduce zone align for main area

This patch calculate main area begin from a new zone,
avoid misalign if segments per zone is not 1.

Signed-off-by: Yunlei He <heyunlei@huawei.com>
Signed-off-by: Shuoran Liu <liushuoran@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
1 file changed