f2fs: clean up several status-related operations

This patch cleans up improper definitions that update some status information.

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

diff --cc fs/f2fs/checkpoint.c
Simple merge

diff --cc fs/f2fs/data.c
Simple merge

diff --cc fs/f2fs/f2fs.h
Simple merge

diff --cc fs/f2fs/gc.c
Simple merge

diff --cc fs/f2fs/segment.c
Simple merge