isa: pic: convert to QEMU Object Model

This converts two devices at once because PIC subclasses ISA and converting
subclasses independently is extremely hard.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/hw/vmport.c b/hw/vmport.c
index 0a3dbc5..c4582d6 100644
--- a/hw/vmport.c
+++ b/hw/vmport.c
@@ -144,11 +144,17 @@
     return 0;
 }
 
-static ISADeviceInfo vmport_info = {
-    .qdev.name     = "vmport",
-    .qdev.size     = sizeof(VMPortState),
-    .qdev.no_user  = 1,
-    .init          = vmport_initfn,
+static void vmport_class_initfn(ObjectClass *klass, void *data)
+{
+    ISADeviceClass *ic = ISA_DEVICE_CLASS(klass);
+    ic->init = vmport_initfn;
+}
+
+static DeviceInfo vmport_info = {
+    .name     = "vmport",
+    .size     = sizeof(VMPortState),
+    .no_user  = 1,
+    .class_init          = vmport_class_initfn,
 };
 
 static void vmport_dev_register(void)