hw/sparc: Constify all Property

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

hw/sparc/sun4m_iommu.c

@@ -368,7 +368,7 @@ static void iommu_init(Object *obj)
     sysbus_init_mmio(dev, &s->iomem);
 }
 
-static Property iommu_properties[] = {
+static const Property iommu_properties[] = {
     DEFINE_PROP_UINT32("version", IOMMUState, version, 0),
     DEFINE_PROP_END_OF_LIST(),
 };