target-xtensa: Introduce QOM realizefn for XtensaCPU

Introduce realizefn and set realized = true in cpu_xtensa_init().

Signed-off-by: Andreas Färber <afaerber@suse.de>
diff --git a/target-xtensa/cpu-qom.h b/target-xtensa/cpu-qom.h
index e344a9a..270de16 100644
--- a/target-xtensa/cpu-qom.h
+++ b/target-xtensa/cpu-qom.h
@@ -43,6 +43,7 @@
 
 /**
  * XtensaCPUClass:
+ * @parent_realize: The parent class' realize handler.
  * @parent_reset: The parent class' reset handler.
  *
  * An Xtensa CPU model.
@@ -52,6 +53,7 @@
     CPUClass parent_class;
     /*< public >*/
 
+    DeviceRealize parent_realize;
     void (*parent_reset)(CPUState *cpu);
 } XtensaCPUClass;