net: macb: Use ether_addr_copy over memcpy

Checkpatch suggests using ether_addr_copy over memcpy
to copy the mac address.
Acked-by: NMichal Simek <michal.simek@xilinx.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: NMoritz Fischer <moritz.fischer@ettus.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/cadence/macb.c

@@ -2973,7 +2973,7 @@ static int macb_probe(struct platform_device *pdev)
 
 	mac = of_get_mac_address(np);
 	if (mac)
-		memcpy(bp->dev->dev_addr, mac, ETH_ALEN);
+		ether_addr_copy(bp->dev->dev_addr, mac);
 	else
 		macb_get_hwaddr(bp);