Move parse_binary_string function to psa_crypto_helpers
Add test code for pbkdf2 in psa_exercise_key

Signed-off-by: Kusumit Ghoderao <Kusumit.Ghoderao@silabs.com>
diff --git a/tests/include/test/psa_crypto_helpers.h b/tests/include/test/psa_crypto_helpers.h
index c0f76c8..a280331 100644
--- a/tests/include/test/psa_crypto_helpers.h
+++ b/tests/include/test/psa_crypto_helpers.h
@@ -241,7 +241,9 @@
 int mbedtls_test_inject_entropy_restore(void);
 #endif /* MBEDTLS_PSA_INJECT_ENTROPY */
 
-
+/** Parse binary string and convert it to a long integer
+ */
+uint64_t parse_binary_string(data_t *bin_string);
 
 /** Skip a test case if the given key is a 192 bits AES key and the AES
  *  implementation is at least partially provided by an accelerator or