gianfar: fix endianness for hardware timestamp

Fix endianness for the 64-bit hardware timestamp value with
be64_to_cpu to support both PowerPC platforms and ARM platforms.
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/freescale/gianfar.c

@@ -2706,7 +2706,7 @@ static void gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue)
 					  ~0x7UL);
 
 			memset(&shhwtstamps, 0, sizeof(shhwtstamps));
-			shhwtstamps.hwtstamp = ns_to_ktime(*ns);
+			shhwtstamps.hwtstamp = ns_to_ktime(be64_to_cpu(*ns));
 			skb_pull(skb, GMAC_FCB_LEN + GMAC_TXPAL_LEN);
 			skb_tstamp_tx(skb, &shhwtstamps);
 			gfar_clear_txbd_status(bdp);
@@ -3035,7 +3035,7 @@ static void gfar_process_frame(struct net_device *ndev, struct sk_buff *skb)
 		u64 *ns = (u64 *) skb->data;
 
 		memset(shhwtstamps, 0, sizeof(*shhwtstamps));
-		shhwtstamps->hwtstamp = ns_to_ktime(*ns);
+		shhwtstamps->hwtstamp = ns_to_ktime(be64_to_cpu(*ns));
 	}
 
 	if (priv->padding)