net/hinic: Fix signed integer overflow

driver inclusion
category: bugfix
bugzilla: 4472

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Use u16 for cons_idx and delta in struct hinic_rxq, or we'll meet a
overflow when a large number of packets are received.
Signed-off-by: NChiqijun <chiqijun@huawei.com>
Reviewed-by: NZengweiliang <zengweiliang.zengweiliang@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

drivers/net/ethernet/huawei/hinic/hinic_rx.h

@@ -75,8 +75,8 @@ struct hinic_rxq {
 	u32			dma_rx_buff_size;
 
 	struct hinic_rxq_stats rxq_stats;
-	int			cons_idx;
-	int			delta;
+	u16			cons_idx;
+	u16			delta;
 
 	u32			irq_id;
 	u16			msix_entry_idx;