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>
diff --git a/include/hw/net/msf2-emac.h b/include/hw/net/msf2-emac.h
index 68194d7..846ba6e 100644
--- a/include/hw/net/msf2-emac.h
+++ b/include/hw/net/msf2-emac.h
@@ -29,9 +29,7 @@
 #include "qom/object.h"
 
 #define TYPE_MSS_EMAC "msf2-emac"
-typedef struct MSF2EmacState MSF2EmacState;
-DECLARE_INSTANCE_CHECKER(MSF2EmacState, MSS_EMAC,
-                         TYPE_MSS_EMAC)
+OBJECT_DECLARE_SIMPLE_TYPE(MSF2EmacState, MSS_EMAC)
 
 #define R_MAX         (0x1a0 / 4)
 #define PHY_MAX_REGS  32