exynos4210_i2c: QOM cast cleanup

Fix one ->qdev access and rename parent field.
Signed-off-by: NAndreas Färber <afaerber@suse.de>

hw/i2c/exynos4210_i2c.c

@@ -80,7 +80,8 @@ static const char *exynos4_i2c_get_regname(unsigned offset)
 #endif
 
 typedef struct Exynos4210I2CState {
-    SysBusDevice busdev;
+    SysBusDevice parent_obj;
+
     MemoryRegion iomem;
     i2c_bus *bus;
     qemu_irq irq;
@@ -297,15 +298,16 @@ static void exynos4210_i2c_reset(DeviceState *d)
     s->scl_free = true;
 }
 
-static int exynos4210_i2c_realize(SysBusDevice *dev)
+static int exynos4210_i2c_realize(SysBusDevice *sbd)
 {
+    DeviceState *dev = DEVICE(sbd);
     Exynos4210I2CState *s = EXYNOS4_I2C(dev);
 
     memory_region_init_io(&s->iomem, OBJECT(s), &exynos4210_i2c_ops, s,
                           TYPE_EXYNOS4_I2C, EXYNOS4_I2C_MEM_SIZE);
-    sysbus_init_mmio(dev, &s->iomem);
-    sysbus_init_irq(dev, &s->irq);
-    s->bus = i2c_init_bus(&dev->qdev, "i2c");
+    sysbus_init_mmio(sbd, &s->iomem);
+    sysbus_init_irq(sbd, &s->irq);
+    s->bus = i2c_init_bus(dev, "i2c");
     return 0;
 }