intc/puv3_intc: Convert sysbus init function to realize function

Use DeviceClass rather than SysBusDeviceClass in
puv3_intc_class_init().

Cc: gxt@mprc.pku.edu.cn

Signed-off-by: Mao Zhongyi <maozhongyi@cmss.chinamobile.com>
Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20181130093852.20739-11-maozhongyi@cmss.chinamobile.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

hw/intc/puv3_intc.c

@@ -101,10 +101,10 @@ static const MemoryRegionOps puv3_intc_ops = {
     .endianness = DEVICE_NATIVE_ENDIAN,
 };
 
-static int puv3_intc_init(SysBusDevice *sbd)
+static void puv3_intc_realize(DeviceState *dev, Error **errp)
 {
-    DeviceState *dev = DEVICE(sbd);
     PUV3INTCState *s = PUV3_INTC(dev);
+    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
 
     qdev_init_gpio_in(dev, puv3_intc_handler, PUV3_IRQS_NR);
     sysbus_init_irq(sbd, &s->parent_irq);
@@ -115,15 +115,12 @@ static int puv3_intc_init(SysBusDevice *sbd)
     memory_region_init_io(&s->iomem, OBJECT(s), &puv3_intc_ops, s, "puv3_intc",
                           PUV3_REGS_OFFSET);
     sysbus_init_mmio(sbd, &s->iomem);
-
-    return 0;
 }
 
 static void puv3_intc_class_init(ObjectClass *klass, void *data)
 {
-    SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
-
-    sdc->init = puv3_intc_init;
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    dc->realize = puv3_intc_realize;
 }
 
 static const TypeInfo puv3_intc_info = {