FROMGIT: f2fs: support recording stop_checkpoint reason into super_block

This patch supports to record stop_checkpoint error into
f2fs_super_block.s_stop_reason[].

Bug: 247456379
Bug: 246094874
(cherry picked from commit 93523dddd98b9838896277fa9cad238a72214f02
https: //git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git dev)
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Change-Id: I3e5fb355a7a7413b1e4bb4937791491ca73e6853