TEMP allow build skipping crypto SN

Author: pennam

src/bpid/csn.h

@@ -29,14 +29,14 @@ namespace arduino { namespace csn {
       defined(ARDUINO_OPTA)                || \
       defined(ARDUINO_GIGA)
     #include <Arduino_SecureElement.h>
-    #define CRYPTO_SN_SIZE 9
+    #define CRYPTO_SN_SIZE 0
 #elif defined(ARDUINO_PORTENTA_C33)        || \
       defined(ARDUINO_NICLA_VISION)
     #include <Arduino_SecureElement.h>
-    #define CRYPTO_SN_SIZE SE05X_SN_LENGTH
+    #define CRYPTO_SN_SIZE 0
 #elif defined(ARDUINO_UNOR4_WIFI)
     #include <Arduino_SecureElement.h>
-    #define CRYPTO_SN_SIZE 6
+    #define CRYPTO_SN_SIZE 0
 #else
     #include <stdint.h>
     #include <stddef.h>