f2fs: Use DIV_ROUND_UP() instead of open-coding

Replace the open-coded divisions with round-up by calls to the
DIV_ROUND_UP() helper macro.

Signed-off-by: Geert Uytterhoeven <[email protected]>
Reviewed-by: Chao Yu <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
3 files changed