realview_gic: Prepare for QOM embedding

Move state struct, type constant and cast macro to a new header.
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAndreas Färber <afaerber@suse.de>

hw/intc/realview_gic.c

@@ -7,20 +7,7 @@
  * This code is licensed under the GPL.
  */
 
-#include "hw/sysbus.h"
-#include "hw/intc/arm_gic.h"
-
-#define TYPE_REALVIEW_GIC "realview_gic"
-#define REALVIEW_GIC(obj) \
-    OBJECT_CHECK(RealViewGICState, (obj), TYPE_REALVIEW_GIC)
-
-typedef struct RealViewGICState {
-    SysBusDevice parent_obj;
-
-    MemoryRegion container;
-
-    GICState gic;
-} RealViewGICState;
+#include "hw/intc/realview_gic.h"
 
 static void realview_gic_set_irq(void *opaque, int irq, int level)
 {

include/hw/intc/realview_gic.h

+/*
+ * ARM RealView Emulation Baseboard Interrupt Controller
+ *
+ * Copyright (c) 2006-2007 CodeSourcery.
+ * Written by Paul Brook
+ *
+ * This code is licensed under the GPL.
+ */
+
+#ifndef HW_INTC_REALVIEW_GIC_H
+#define HW_INTC_REALVIEW_GIC_H
+
+#include "hw/sysbus.h"
+#include "hw/intc/arm_gic.h"
+
+#define TYPE_REALVIEW_GIC "realview_gic"
+#define REALVIEW_GIC(obj) \
+    OBJECT_CHECK(RealViewGICState, (obj), TYPE_REALVIEW_GIC)
+
+typedef struct RealViewGICState {
+    SysBusDevice parent_obj;
+
+    MemoryRegion container;
+
+    GICState gic;
+} RealViewGICState;
+
+#endif