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>

include/net/filter.h

@@ -15,6 +15,7 @@
 #include "net/queue.h"
 
 #define TYPE_NETFILTER "netfilter"
+typedef struct NetFilterClass NetFilterClass;
 #define NETFILTER(obj) \
     OBJECT_CHECK(NetFilterState, (obj), TYPE_NETFILTER)
 #define NETFILTER_GET_CLASS(obj) \
@@ -40,7 +41,7 @@ typedef void (FilterStatusChanged) (NetFilterState *nf, Error **errp);
 
 typedef void (FilterHandleEvent) (NetFilterState *nf, int event, Error **errp);
 
-typedef struct NetFilterClass {
+struct NetFilterClass {
     ObjectClass parent_class;
 
     /* optional */
@@ -50,7 +51,7 @@ typedef struct NetFilterClass {
     FilterHandleEvent *handle_event;
     /* mandatory */
     FilterReceiveIOV *receive_iov;
-} NetFilterClass;
+};
 
 
 struct NetFilterState {