fsck.f2fs: Fix slow fsck in auto-fix mode am: 3973c080af am: a90c93387f

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/f2fs-tools/+/11910345

Change-Id: I0c7ffde64b34b2c5e6a5e1f214c24b32bc1b1b05