tests/i440fx-test: Don't define ARRAY_SIZE locally

Don't define ARRAY_SIZE locally; instead include osdep.h for it.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Reviewed-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>

tests/i440fx-test.c

@@ -12,6 +12,7 @@
  * See the COPYING file in the top-level directory.
  */
 
+#include "qemu/osdep.h"
 #include <glib.h>
 #include <string.h>
 #include <stdio.h>
@@ -27,8 +28,6 @@
 
 #define BROKEN 1
 
-#define ARRAY_SIZE(array) (sizeof(array) / sizeof((array)[0]))
-
 typedef struct TestData
 {
     int num_cpus;