net: hldc_fr: use dev_addr_set()

Commit 406f42fa0d3c ("net-next: When a bond have a massive amount
of VLANs...") introduced a rbtree for faster Ethernet address look
up. To maintain netdev->dev_addr in this tree we need to make all
the writes to it got through appropriate helpers.

Acked-by: Krzysztof Hałasa <[e-mail]>
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/wan/hdlc_fr.c

···
 		dev->priv_flags &= ~IFF_TX_SKB_SHARING;
 		eth_hw_addr_random(dev);
 	} else {
-		*(__be16 *)dev->dev_addr = htons(dlci);
+		__be16 addr = htons(dlci);
+
+		dev_addr_set(dev, (u8 *)&addr);
 		dlci_to_q922(dev->broadcast, dlci);
 	}
 	dev->netdev_ops = &pvc_ops;