Use the %pM kernel extension to display the MAC address.
Also, remove the 'mac' variable and use nic->mac directly.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Acked-by: Peter Jones <pjones@redhat.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: David S. Miller <davem@davemloft.net>