net: hsr: get ready for const netdev->dev_addr

hsr_create_self_node() may get netdev->dev_addr
passed as argument, netdev->dev_addr will be
const soon.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 files changed