net/netvsc: forward per-queue stats from VF device

hn_vf_stats_get was ignoring the qstats parameter (__rte_unused),
calling rte_eth_stats_get which only collects aggregate stats. This
meant per-queue stats (rx_q0_good_packets, tx_q0_good_packets, etc.)
were always zero when VF datapath was active, even though the
underlying MANA driver populates them in its stats_get callback.

Call the VF device's stats_get op directly with the qstats pointer
so per-queue counters are forwarded through netvsc to the xstats
telemetry output.

Signed-off-by: Long Li <longli@microsoft.com>

Author: longlimsft

drivers/net/netvsc/hn_vf.c

@@ -855,16 +855,20 @@ void hn_vf_rx_queue_release(struct hn_data *hv, uint16_t queue_id)
 
 int hn_vf_stats_get(struct rte_eth_dev *dev,
 		    struct rte_eth_stats *stats,
-		    struct eth_queue_stats *qstats __rte_unused)
+		    struct eth_queue_stats *qstats)
 {
 	struct hn_data *hv = dev->data->dev_private;
 	struct rte_eth_dev *vf_dev;
 	int ret = 0;
 
 	rte_rwlock_read_lock(&hv->vf_lock);
 	vf_dev = hn_get_vf_dev(hv);
-	if (vf_dev)
-		ret = rte_eth_stats_get(vf_dev->data->port_id, stats);
+	if (vf_dev) {
+		if (vf_dev->dev_ops->stats_get)
+			ret = vf_dev->dev_ops->stats_get(vf_dev, stats, qstats);
+		else
+			ret = rte_eth_stats_get(vf_dev->data->port_id, stats);
+	}
 	rte_rwlock_read_unlock(&hv->vf_lock);
 	return ret;
 }