ANDROID: f2fs: fix missing blk-crypto changes

I missed to fix blk-crypto changes that should be applied in compression flow.

Fixes: dad710c5 ("Merge remote-tracking branch 'aosp/upstream-f2fs-stable-linux-4.14.y' into android-4.14")
Change-Id: Icdf8e0561c6f377fa23ab38cc8c57c2365b297d3
Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>