ftgmac100: do not link to netdev

qdev_set_nic_properties() is already used in the Aspeed SoC level to
bind the ftgmac100 device to the netdev.

This is fixing support for multiple net devices.
Signed-off-by: NCédric Le Goater <clg@kaod.org>
Signed-off-by: NJason Wang <jasowang@redhat.com>

hw/net/ftgmac100.c

@@ -1017,8 +1017,6 @@ static void ftgmac100_realize(DeviceState *dev, Error **errp)
     sysbus_init_irq(sbd, &s->irq);
     qemu_macaddr_default_if_unset(&s->conf.macaddr);
 
-    s->conf.peers.ncs[0] = nd_table[0].netdev;
-
     s->nic = qemu_new_nic(&net_ftgmac100_info, &s->conf,
                           object_get_typename(OBJECT(dev)), DEVICE(dev)->id,
                           s);