fs_mgr: call format_f2fs correctly with -f

This patch formats f2fs with -f option.

Change-Id: I3fc415f35d81f22cbf1eadebc619465d36205927
Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>
(cherry picked from commit 0331c2cf7734d44cc4832fbad05b6f3bdb619f92)
1 file changed