net: hnss3: use max() to simplify code

Replace the "? :" statement wich max() to simplify code.
Signed-off-by: NHao Chen <chenhao288@hisilicon.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

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

@@ -971,8 +971,7 @@ static u32 hns3_tx_spare_space(struct hns3_enet_ring *ring)
 	/* The free tx buffer is divided into two part, so pick the
 	 * larger one.
 	 */
-	return (ntc > (tx_spare->len - ntu) ? ntc :
-			(tx_spare->len - ntu)) - 1;
+	return max(ntc, tx_spare->len - ntu) - 1;
 }
 
 static void hns3_tx_spare_update(struct hns3_enet_ring *ring)