sparc64 follow pci_nic_init change

sun4u.c: correct pci_nic_init arguments following
commit 5607c388Signed-off-by: NIgor V. Kovalenko <igor.v.kovalenko@gmail.com>

hw/sun4u.c

@@ -479,7 +479,7 @@ static void sun4uv_init(ram_addr_t RAM_size,
     }
 
     for(i = 0; i < nb_nics; i++)
-        pci_nic_init(pci_bus, &nd_table[i], -1, "ne2k_pci");
+        pci_nic_init(&nd_table[i], "ne2k_pci", NULL);
 
     irq = qemu_allocate_irqs(cpu_set_irq, env, MAX_PILS);
     if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {