f2fs: use round_up to enhance calculation

.i_cluster_size should be power of 2, so we can use round_up() instead
of roundup() to enhance the calculation.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2020-04-08 19:55:17 +08:00 • committed by Jaegeuk Kim
commit 4fec3fc026