qdev: set properties with device_class_set_props()

The following patch will need to handle properties registration during
class_init time. Let's use a device_class_set_props() setter.

spatch --macro-file scripts/cocci-macro-file.h  --sp-file
./scripts/coccinelle/qdev-set-props.cocci --keep-comments --in-place
--dir .

@@
typedef DeviceClass;
DeviceClass *d;
expression val;
@@
- d->props = val
+ device_class_set_props(d, val)

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20200110153039.1379601-20-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/hw/xen/xen-legacy-backend.c b/hw/xen/xen-legacy-backend.c
index 4412d7aa..4a373b2 100644
--- a/hw/xen/xen-legacy-backend.c
+++ b/hw/xen/xen-legacy-backend.c
@@ -786,7 +786,7 @@
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
-    dc->props = xendev_properties;
+    device_class_set_props(dc, xendev_properties);
     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
     /* xen-backend devices can be plugged/unplugged dynamically */
     dc->user_creatable = true;
@@ -824,7 +824,7 @@
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
-    dc->props = xen_sysdev_properties;
+    device_class_set_props(dc, xen_sysdev_properties);
     dc->bus_type = TYPE_XENSYSBUS;
 }