misc/pci-testdev: QOM parent field cleanup

Replace direct uses of PCITestDevState::dev with QOM casts and rename it
to parent_obj.
Acked-by: NPeter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: NAndreas Färber <afaerber@suse.de>

hw/misc/pci-testdev.c

@@ -76,7 +76,10 @@ enum {
 #define IOTEST_ACCESS_WIDTH (sizeof(uint8_t))
 
 typedef struct PCITestDevState {
-    PCIDevice dev;
+    /*< private >*/
+    PCIDevice parent_obj;
+    /*< public >*/
+
     MemoryRegion mmio;
     MemoryRegion portio;
     IOTest *tests;
@@ -237,7 +240,7 @@ static int pci_testdev_init(PCIDevice *pci_dev)
     char *name;
     int r, i;
 
-    pci_conf = d->dev.config;
+    pci_conf = pci_dev->config;
 
     pci_conf[PCI_INTERRUPT_PIN] = 0; /* no interrupt pin */
 
@@ -245,8 +248,8 @@ static int pci_testdev_init(PCIDevice *pci_dev)
                           "pci-testdev-mmio", IOTEST_MEMSIZE * 2);
     memory_region_init_io(&d->portio, OBJECT(d), &pci_testdev_pio_ops, d,
                           "pci-testdev-portio", IOTEST_IOSIZE * 2);
-    pci_register_bar(&d->dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &d->mmio);
-    pci_register_bar(&d->dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &d->portio);
+    pci_register_bar(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &d->mmio);
+    pci_register_bar(pci_dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &d->portio);
 
     d->current = -1;
     d->tests = g_malloc0(IOTEST_MAX * sizeof *d->tests);