Use OBJECT_DECLARE_SIMPLE_TYPE when possible

This converts existing DECLARE_INSTANCE_CHECKER usage to
OBJECT_DECLARE_SIMPLE_TYPE when possible.

$ ./scripts/codeconverter/converter.py -i \
  --pattern=AddObjectDeclareSimpleType $(git grep -l '' -- '*.[ch]')

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Acked-by: Paul Durrant <paul@xen.org>
Message-Id: <20200916182519.415636-6-ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

hw/hyperv/hyperv.c

@@ -35,11 +35,9 @@ struct SynICState {
     struct hyperv_message_page *msg_page;
     struct hyperv_event_flags_page *event_page;
 };
-typedef struct SynICState SynICState;
 
 #define TYPE_SYNIC "hyperv-synic"
-DECLARE_INSTANCE_CHECKER(SynICState, SYNIC,
-                         TYPE_SYNIC)
+OBJECT_DECLARE_SIMPLE_TYPE(SynICState, SYNIC)
 
 static bool synic_enabled;