Introduce MBEDTLS_PRIVATE macro.

Public structs members are considered private and should not
be used by users application.

MBEDTLS_PRIVATE(member) macro is intended to clearly indicate
which members are private.

Signed-off-by: Mateusz Starzyk <mateusz.starzyk@mobica.com>
diff --git a/tests/include/test/helpers.h b/tests/include/test/helpers.h
index 9bfe085..0f82a90 100644
--- a/tests/include/test/helpers.h
+++ b/tests/include/test/helpers.h
@@ -25,6 +25,8 @@
 #ifndef TEST_HELPERS_H
 #define TEST_HELPERS_H
 
+#define MBEDTLS_ALLOW_PRIVATE_ACCESS
+
 #if !defined(MBEDTLS_CONFIG_FILE)
 #include "mbedtls/config.h"
 #else
diff --git a/tests/src/drivers/test_driver_aead.c b/tests/src/drivers/test_driver_aead.c
index 25396c9..a147163 100644
--- a/tests/src/drivers/test_driver_aead.c
+++ b/tests/src/drivers/test_driver_aead.c
@@ -23,6 +23,8 @@
 #include MBEDTLS_CONFIG_FILE
 #endif
 
+#include <test/helpers.h>
+
 #if defined(MBEDTLS_PSA_CRYPTO_DRIVERS) && defined(PSA_CRYPTO_DRIVER_TEST)
 #include "psa_crypto_aead.h"
 
diff --git a/tests/src/drivers/test_driver_cipher.c b/tests/src/drivers/test_driver_cipher.c
index a415dd8..4827946 100644
--- a/tests/src/drivers/test_driver_cipher.c
+++ b/tests/src/drivers/test_driver_cipher.c
@@ -24,6 +24,8 @@
 #include MBEDTLS_CONFIG_FILE
 #endif
 
+#include <test/helpers.h>
+
 #if defined(MBEDTLS_PSA_CRYPTO_DRIVERS) && defined(PSA_CRYPTO_DRIVER_TEST)
 #include "psa/crypto.h"
 #include "psa_crypto_cipher.h"
diff --git a/tests/src/drivers/test_driver_signature.c b/tests/src/drivers/test_driver_signature.c
index 14de831..fdfba16 100644
--- a/tests/src/drivers/test_driver_signature.c
+++ b/tests/src/drivers/test_driver_signature.c
@@ -25,6 +25,8 @@
 #include MBEDTLS_CONFIG_FILE
 #endif
 
+#include <test/helpers.h>
+
 #if defined(MBEDTLS_PSA_CRYPTO_DRIVERS) && defined(PSA_CRYPTO_DRIVER_TEST)
 #include "psa/crypto.h"
 #include "psa_crypto_core.h"
diff --git a/tests/suites/helpers.function b/tests/suites/helpers.function
index 2ef07fa..ca03532 100644
--- a/tests/suites/helpers.function
+++ b/tests/suites/helpers.function
@@ -2,6 +2,8 @@
 /*----------------------------------------------------------------------------*/
 /* Headers */
 
+#define MBEDTLS_ALLOW_PRIVATE_ACCESS
+
 #include <test/macros.h>
 #include <test/helpers.h>
 #include <test/random.h>
diff --git a/tests/suites/main_test.function b/tests/suites/main_test.function
index ac00f45..62a6678 100644
--- a/tests/suites/main_test.function
+++ b/tests/suites/main_test.function
@@ -29,14 +29,6 @@
 #include MBEDTLS_CONFIG_FILE
 #endif
 
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-#include "psa/crypto.h"
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
-#if defined(MBEDTLS_TEST_HOOKS)
-#include "mbedtls/error.h"
-#endif
-
 /* Test code may use deprecated identifiers only if the preprocessor symbol
  * MBEDTLS_TEST_DEPRECATED is defined. When building tests, set
  * MBEDTLS_TEST_DEPRECATED explicitly if MBEDTLS_DEPRECATED_WARNING is