Move QOM typedefs and add missing includes

Some typedefs and macros are defined after the type check macros.
This makes it difficult to automatically replace their
definitions with OBJECT_DECLARE_TYPE.

Patch generated using:

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

which will split "typdef struct { ... } TypedefName"
declarations.

Followed by:

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

which will:
- move the typedefs and #defines above the type check macros
- add missing #include "qom/object.h" lines if necessary

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-Id: <20200831210740.126168-9-ehabkost@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-Id: <20200831210740.126168-10-ehabkost@redhat.com>
Message-Id: <20200831210740.126168-11-ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
diff --git a/include/qom/object_interfaces.h b/include/qom/object_interfaces.h
index 7035829..2be985f 100644
--- a/include/qom/object_interfaces.h
+++ b/include/qom/object_interfaces.h
@@ -6,6 +6,7 @@
 
 #define TYPE_USER_CREATABLE "user-creatable"
 
+typedef struct UserCreatableClass UserCreatableClass;
 #define USER_CREATABLE_CLASS(klass) \
      OBJECT_CLASS_CHECK(UserCreatableClass, (klass), \
                         TYPE_USER_CREATABLE)
@@ -40,14 +41,14 @@
  * object's type implements USER_CREATABLE interface and needs
  * complete() callback to be called.
  */
-typedef struct UserCreatableClass {
+struct UserCreatableClass {
     /* <private> */
     InterfaceClass parent_class;
 
     /* <public> */
     void (*complete)(UserCreatable *uc, Error **errp);
     bool (*can_be_deleted)(UserCreatable *uc);
-} UserCreatableClass;
+};
 
 /**
  * user_creatable_complete: