Use DECLARE_*CHECKER* macros

Generated using:

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

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-Id: <20200831210740.126168-12-ehabkost@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-Id: <20200831210740.126168-13-ehabkost@redhat.com>
Message-Id: <20200831210740.126168-14-ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
diff --git a/chardev/testdev.c b/chardev/testdev.c
index bbae59c..a92caca 100644
--- a/chardev/testdev.c
+++ b/chardev/testdev.c
@@ -40,8 +40,8 @@
 typedef struct TestdevChardev TestdevChardev;
 
 #define TYPE_CHARDEV_TESTDEV "chardev-testdev"
-#define TESTDEV_CHARDEV(obj)                                    \
-    OBJECT_CHECK(TestdevChardev, (obj), TYPE_CHARDEV_TESTDEV)
+DECLARE_INSTANCE_CHECKER(TestdevChardev, TESTDEV_CHARDEV,
+                         TYPE_CHARDEV_TESTDEV)
 
 /* Try to interpret a whole incoming packet */
 static int testdev_eat_packet(TestdevChardev *testdev)