For tests, rename ASSERT_COMPARE() to TEST_BUFFERS_EQUAL()

Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
diff --git a/tests/suites/test_suite_aes.function b/tests/suites/test_suite_aes.function
index e96e407..c88f4c3 100644
--- a/tests/suites/test_suite_aes.function
+++ b/tests/suites/test_suite_aes.function
@@ -34,7 +34,7 @@
     // Decrypt
     TEST_ASSERT(mbedtls_aes_crypt_ecb(dec, MBEDTLS_AES_DECRYPT,
                                       ciphertext, output) == 0);
-    ASSERT_COMPARE(plaintext, 16, output, 16);
+    TEST_BUFFERS_EQUAL(plaintext, 16, output, 16);
 
     mbedtls_aes_free(dec);