input/pl050: Convert sysbus init function to realize function

Use DeviceClass rather than SysBusDeviceClass in
pl050_class_init().

Cc: peter.maydell@linaro.org
Cc: qemu-arm@nongnu.org
Signed-off-by: NMao Zhongyi <maozhongyi@cmss.chinamobile.com>
Signed-off-by: NZhang Shengju <zhangshengju@cmss.chinamobile.com>
Reviewed-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20181130093852.20739-10-maozhongyi@cmss.chinamobile.com
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

hw/input/pl050.c

@@ -139,19 +139,19 @@ static const MemoryRegionOps pl050_ops = {
     .endianness = DEVICE_NATIVE_ENDIAN,
 };
 
-static int pl050_initfn(SysBusDevice *dev)
+static void pl050_realize(DeviceState *dev, Error **errp)
 {
     PL050State *s = PL050(dev);
+    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
 
     memory_region_init_io(&s->iomem, OBJECT(s), &pl050_ops, s, "pl050", 0x1000);
-    sysbus_init_mmio(dev, &s->iomem);
-    sysbus_init_irq(dev, &s->irq);
+    sysbus_init_mmio(sbd, &s->iomem);
+    sysbus_init_irq(sbd, &s->irq);
     if (s->is_mouse) {
         s->dev = ps2_mouse_init(pl050_update, s);
     } else {
         s->dev = ps2_kbd_init(pl050_update, s);
     }
-    return 0;
 }
 
 static void pl050_keyboard_init(Object *obj)
@@ -183,9 +183,8 @@ static const TypeInfo pl050_mouse_info = {
 static void pl050_class_init(ObjectClass *oc, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
-    SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(oc);
 
-    sdc->init = pl050_initfn;
+    dc->realize = pl050_realize;
     dc->vmsd = &vmstate_pl050;
 }