ethernet: hisilicon: hns: hns_dsaf_mac: Use generic eth_broadcast_addr

ethernet: hisilicon: hns: hns_dsaf_mac: Use generic eth_broadcast_addr

BugLink: https://bugs.launchpad.net/bugs/1810457
Rather than use an on-stack array to copy a broadcast address, use
the generic eth_broadcast_addr function to save a trivial amount of
object code.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 49b44aa23e58d292cc1be79a5c7883ac8c927676)
Signed-off-by: dann frazier <dann.frazier@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>