f2fs-tools: give less overprovisioning space

As f2fs becomes more resilient for GCs, let's give the marginal overprovision
space back to user.

Fix an issue where reserved_space > ovp_space, reported by Shinichiro.

Signed-off-by: Shinichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
3 files changed