Added the OPTi 82c602, on-board CL-GD 5430, and also gave the PC87306 Super I/O chip its full NVR capabilities, fixes #2877.

src/machine/m_at_socket5.c

@@ -170,7 +170,7 @@ machine_at_zappa_init(const machine_t *model)
     if (bios_only || !ret)
         return ret;
 
-    machine_at_common_init(model);
+    machine_at_common_init_ex(model, 2);
 
     pci_init(PCI_CONFIG_TYPE_1);
     pci_register_slot(0x00, PCI_CARD_NORTHBRIDGE, 0, 0, 0, 0);