[golan] Fix address-of-pointer bug for multicast attach/detach

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/drivers/infiniband/flexboot_nodnic.c

 
 	switch (qp->type) {
 	case IB_QPT_ETH:
-		memcpy(&mac, &gid, sizeof(mac));
+		memcpy(&mac, gid, sizeof(mac));
 		status = nodnic_port_add_mac_filter(&port->port_priv, mac);
 		MLX_CHECK_STATUS(flexboot_nodnic->device_priv, status, mac_err,
 				"nodnic_port_add_mac_filter failed");
 
 	switch (qp->type) {
 	case IB_QPT_ETH:
-		memcpy(&mac, &gid, sizeof(mac));
+		memcpy(&mac, gid, sizeof(mac));
 		status = nodnic_port_remove_mac_filter(&port->port_priv, mac);
 		MLX_CHECK_STATUS(flexboot_nodnic->device_priv, status, mac_err,
 				"nodnic_port_remove_mac_filter failed");