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

This reverts commit 0aed061b.

This should not have been reverted in this branch as it was already here
as part of the f2fs-stable merge that was done in commit 8ed00839
("Merge remote-tracking branch 'origin/upstream-f2fs-stable-linux-4.9.y'
into android-4.9") already contained it and everything built fine.

The build error in android-4.9-p occurs due to the presence of commit
c804fcf3 ("f2fs: no need return value in restore summary process")
and lack of commit 3c74326b ("f2fs: fix to propagate error from
__get_meta_page()") in that branch.

Change-Id: I0738d38a0feca9dfd1115871ecd33ee93442d76b
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>