net: stmmac: don't clear network statistics in .ndo_open()

FWICT, the common style in other network drivers: the network
statistics are not cleared since initialization, follow the common
style for stmmac.
Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Link: https://lore.kernel.org/r/20230717160630.1892-2-jszhang@kernel.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

@@ -3829,10 +3829,6 @@ static int __stmmac_open(struct net_device *dev,
 		}
 	}
 
-	/* Extra statistics */
-	memset(&priv->xstats, 0, sizeof(struct stmmac_extra_stats));
-	priv->xstats.threshold = tc;
-
 	priv->rx_copybreak = STMMAC_RX_COPYBREAK;
 
 	buf_sz = dma_conf->dma_buf_sz;
@@ -7322,6 +7318,8 @@ int stmmac_dvr_probe(struct device *device,
 #endif
 	priv->msg_enable = netif_msg_init(debug, default_msg_level);
 
+	priv->xstats.threshold = tc;
+
 	/* Initialize RSS */
 	rxq = priv->plat->rx_queues_to_use;
 	netdev_rss_key_fill(priv->rss.key, sizeof(priv->rss.key));