This patch implements set_mac_address for the sungem driver.  This
allows changing the mac address of the interface, even when the
interface is up.
Signed-off-by: NRuben Vandeginste <snowbender@gmail.com>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>