RDMA/mlx5: Use dev_addr_mod()

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.

Link: https://lore.kernel.org/r/20211019182604.1441387-3-kuba@kernel.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c

@@ -472,11 +472,13 @@ int mlx5i_dev_init(struct net_device *dev)
 {
 	struct mlx5e_priv    *priv   = mlx5i_epriv(dev);
 	struct mlx5i_priv    *ipriv  = priv->ppriv;
+	u8 addr_mod[3];
 
 	/* Set dev address using underlay QP */
-	dev->dev_addr[1] = (ipriv->qpn >> 16) & 0xff;
-	dev->dev_addr[2] = (ipriv->qpn >>  8) & 0xff;
-	dev->dev_addr[3] = (ipriv->qpn) & 0xff;
+	addr_mod[0] = (ipriv->qpn >> 16) & 0xff;
+	addr_mod[1] = (ipriv->qpn >>  8) & 0xff;
+	addr_mod[2] = (ipriv->qpn) & 0xff;
+	dev_addr_mod(dev, 1, addr_mod, sizeof(addr_mod));
 
 	/* Add QPN to net-device mapping to HT */
 	mlx5i_pkey_add_qpn(dev, ipriv->qpn);