move ARRAY_SIZE() definition to utils.h

firmware/src_simtrace/iso7816_fidi.c

@@ -20,10 +20,9 @@
 #include <stdint.h>
 #include <errno.h>
 
+#include "utils.h"
 #include "iso7816_fidi.h"
 
-#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
-
 /* Table 7 of ISO 7816-3:2006 */
 static const uint16_t fi_table[] = {
 	372, 372, 558, 744, 1116, 1488, 1860, 0,

firmware/src_simtrace/utils.h

@@ -0,0 +1,4 @@
+#pragma once
+
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+