f2fs: fix to show ino management cache size correctly

It needs to stat size of ino management cache with all type instead of
orphan ino type.

Fixes: 652be551 ("f2fs: show # of orphan inodes")
Signed-off-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/debug.c

@@ -240,7 +240,7 @@ static void update_mem_info(struct f2fs_sb_info *sbi)
 	si->cache_mem += NM_I(sbi)->dirty_nat_cnt *
 					sizeof(struct nat_entry_set);
 	si->cache_mem += si->inmem_pages * sizeof(struct inmem_pages);
-	for (i = 0; i <= ORPHAN_INO; i++)
+	for (i = 0; i < MAX_INO_ENTRY; i++)
 		si->cache_mem += sbi->im[i].ino_num * sizeof(struct ino_entry);
 	si->cache_mem += atomic_read(&sbi->total_ext_tree) *
 						sizeof(struct extent_tree);