LIB: Move tfm_log.h to tfm_tests_log_msg.h

Rename this header to avoid name clashes with the tfm_log.h in the main
trusted-firmware-m repo.

Change-Id: I3823142c92426bbc01b1f46829dee0a3f462c095
Signed-off-by: Jackson Cooper-Driver <jackson.cooper-driver@arm.com>
diff --git a/tests_reg/test_app.c b/tests_reg/test_app.c
index 2d2df21..7ab6017 100644
--- a/tests_reg/test_app.c
+++ b/tests_reg/test_app.c
@@ -1,12 +1,12 @@
 /*
- * Copyright (c) 2017-2023, Arm Limited. All rights reserved.
+ * SPDX-FileCopyrightText: Copyright The TrustedFirmware-M Contributors
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
  */
 
 #include "test_app.h"
-#include "tfm_log.h"
+#include "tfm_tests_log_msg.h"
 #ifdef TFM_NS_REG_TEST
 #include "non_secure_suites.h"
 #endif