pnv-core: use get_uint() for "core-pir" property

This is an alias of TYPE_PNV_CORE's property "pir", which is defined
with DEFINE_PROP_UINT32()

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20170607163635.17635-38-marcandre.lureau@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>

hw/ppc/pnv_core.c

@@ -51,7 +51,7 @@ static void powernv_cpu_init(PowerPCCPU *cpu, Error **errp)
     int thread_index = 0; /* TODO: TCG supports only one thread */
     ppc_spr_t *pir = &env->spr_cb[SPR_PIR];
 
-    core_pir = object_property_get_int(OBJECT(cpu), "core-pir", &error_abort);
+    core_pir = object_property_get_uint(OBJECT(cpu), "core-pir", &error_abort);
 
     /*
      * The PIR of a thread is the core PIR + the thread index. We will