sfc: Use ether_addr_copy and eth_broadcast_addr

Faster than memcpy/memset on some architectures.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc drivers/net/ethernet/sfc/ef10.c
Simple merge

diff --cc drivers/net/ethernet/sfc/efx.c
Simple merge

diff --cc drivers/net/ethernet/sfc/ethtool.c
Simple merge

diff --cc drivers/net/ethernet/sfc/falcon.c
Simple merge

diff --cc drivers/net/ethernet/sfc/filter.h
Simple merge

diff --cc drivers/net/ethernet/sfc/mcdi.c
Simple merge

diff --cc drivers/net/ethernet/sfc/mcdi_port.c
Simple merge

diff --cc drivers/net/ethernet/sfc/selftest.c
Simple merge

diff --cc drivers/net/ethernet/sfc/siena_sriov.c
Simple merge