f2fs: fix memory leak of write_io in fill_super()

It needs to release memory allocated for sbi->write_io in error path,
otherwise, it will cause memory leak.
Signed-off-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/super.c

@@ -2871,7 +2871,7 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
 				     GFP_KERNEL);
 		if (!sbi->write_io[i]) {
 			err = -ENOMEM;
-			goto free_options;
+			goto free_bio_info;
 		}
 
 		for (j = HOT; j < n; j++) {