ANDROID: Revert "f2fs: avoid out-of-range memory access"

This reverts commit e52e9e4c which is
commit 56f3ce67 upstream.

This is being done because segment.c is a bit "different" in this
branch, and we should keep the f2fs fixes away from here for now.
Otherwise the build breaks.

Change-Id: I014e3381acb1112825f305d47bdf88848ee6fb7f
Cc: Ocean Chen <oceanchen@google.com>
Cc: Jaegeuk Kim <jaegeuk@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>