tulip: convert to use netdev_for_each_mc_addr

also bug in de2104x.c was corrected:
for (i = 0; i < 32; i++) loop should be outside mc_list iteration.

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>