net: hns3: keep the code align with mainline

driver inclusion
category: bugfix
bugzilla: NA
CVE: NA

update the code to make it the same with mainline.
Signed-off-by: NYunsheng Lin <linyunsheng@huawei.com>
Reviewed-by: Nlipeng <lipeng321@huawei.com>
Reviewed-by: NXie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

drivers/net/ethernet/hisilicon/hns3/hns3_enet.h

@@ -304,10 +304,10 @@ struct hns3_desc_cb {
 	/* priv data for the desc, e.g. skb when use with ip stack*/
 	void *priv;
 	u32 page_offset;
-	u32 reuse_flag;
-
 	u32 length;     /* length of the buffer */
 
+	u16 reuse_flag;
+
 	/* desc type, used by the ring user to mark the type of the priv data */
 	u16 type;
 };