For tests, rename TEST_CALLOC_OR_FAIL() to just TEST_CALLOC()

Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
diff --git a/tests/src/test_helpers/ssl_helpers.c b/tests/src/test_helpers/ssl_helpers.c
index e346ca0..2fea014 100644
--- a/tests/src/test_helpers/ssl_helpers.c
+++ b/tests/src/test_helpers/ssl_helpers.c
@@ -566,9 +566,9 @@
     }
 
     cert = &(ep->cert);
-    TEST_CALLOC_OR_FAIL(cert->ca_cert, 1);
-    TEST_CALLOC_OR_FAIL(cert->cert, 1);
-    TEST_CALLOC_OR_FAIL(cert->pkey, 1);
+    TEST_CALLOC(cert->ca_cert, 1);
+    TEST_CALLOC(cert->cert, 1);
+    TEST_CALLOC(cert->pkey, 1);
 
     mbedtls_x509_crt_init(cert->ca_cert);
     mbedtls_x509_crt_init(cert->cert);