ethernet: aquantia: use eth_hw_addr_set()

Commit 406f42fa ("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.

Use an array on the stack, then call eth_hw_addr_set().
eth_hw_addr_set() is after error checking, this should
be fine, error propagates all the way to failing probe.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/aquantia/atlantic/aq_nic.c

@@ -300,6 +300,7 @@ static bool aq_nic_is_valid_ether_addr(const u8 *addr)
 
 int aq_nic_ndev_register(struct aq_nic_s *self)
 {
+	u8 addr[ETH_ALEN];
 	int err = 0;
 
 	if (!self->ndev) {
@@ -316,12 +317,13 @@ int aq_nic_ndev_register(struct aq_nic_s *self)
 #endif
 
 	mutex_lock(&self->fwreq_mutex);
-	err = self->aq_fw_ops->get_mac_permanent(self->aq_hw,
-			    self->ndev->dev_addr);
+	err = self->aq_fw_ops->get_mac_permanent(self->aq_hw, addr);
 	mutex_unlock(&self->fwreq_mutex);
 	if (err)
 		goto err_exit;
 
+	eth_hw_addr_set(self->ndev, addr);
+
 	if (!is_valid_ether_addr(self->ndev->dev_addr) ||
 	    !aq_nic_is_valid_ether_addr(self->ndev->dev_addr)) {
 		netdev_warn(self->ndev, "MAC is invalid, will use random.");