exec: move cpu_exec_init() calls to realize functions

Modify all CPUs to call it from XXX_cpu_realizefn() function.

Remove all the cannot_destroy_with_object_finalize_yet as
unsafe references have been moved to cpu_exec_realizefn().
(tested with QOM command provided by commit 4c315c27)

for arm:

Setting of cpu->mp_affinity is moved from arm_cpu_initfn()
to arm_cpu_realizefn() as setting of cpu_index is now done
in cpu_exec_realizefn(). To avoid to overwrite an user defined
value, we set it to an invalid value by default, and update
it in realize function only if the value is still invalid.

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
diff --git a/target-moxie/cpu.c b/target-moxie/cpu.c
index 50a0899..b0be4a7 100644
--- a/target-moxie/cpu.c
+++ b/target-moxie/cpu.c
@@ -61,6 +61,13 @@
 {
     CPUState *cs = CPU(dev);
     MoxieCPUClass *mcc = MOXIE_CPU_GET_CLASS(dev);
+    Error *local_err = NULL;
+
+    cpu_exec_realizefn(cs, &local_err);
+    if (local_err != NULL) {
+        error_propagate(errp, local_err);
+        return;
+    }
 
     qemu_init_vcpu(cs);
     cpu_reset(cs);
@@ -75,7 +82,6 @@
     static int inited;
 
     cs->env_ptr = &cpu->env;
-    cpu_exec_init(cs, &error_abort);
 
     if (tcg_enabled() && !inited) {
         inited = 1;
@@ -124,13 +130,6 @@
     cc->vmsd = &vmstate_moxie_cpu;
 #endif
     cc->disas_set_info = moxie_cpu_disas_set_info;
-
-    /*
-     * Reason: moxie_cpu_initfn() calls cpu_exec_init(), which saves
-     * the object in cpus -> dangling pointer after final
-     * object_unref().
-     */
-    dc->cannot_destroy_with_object_finalize_yet = true;
 }
 
 static void moxielite_initfn(Object *obj)