f2fs: fix the missing write pointer correction

If checkpoint was disabled, we missed to fix the write pointers.

Cc: <stable@vger.kernel.org>
Fixes: 10150356 ("f2fs: fix changing cursegs if recovery fails on zoned device")
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>