fiemap: support FIEMAP_EXTENT_MERGED

F2FS starts to give a hint, FIEMAP_EXTENT_MERGED, in fiemap, so please allow it.

Bug: 180137825
Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>
Change-Id: Ic4e3f573e385d248627da1a2ad64fbbd4a74e679
1 file changed