UPSTREAM: f2fs: fix to update age extent in f2fs_do_zero_range()

We should update age extent in f2fs_do_zero_range() like we
did in f2fs_truncate_data_blocks_range().

Bug: 254441685
Fixes: 71644dff ("f2fs: add block_age-based extent cache")
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
(cherry picked from commit a84153f9)
Signed-off-by: Lee Jones <joneslee@google.com>
Change-Id: I775351141745194b08c5f149be36cd275ab84e4c