feat(drtm): add platform functions for DRTM

Added platform hooks to retrieve DRTM features and
address map.
Additionally, implemented these hooks for the FVP platform.

Signed-off-by: John Powell <john.powell@arm.com>
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: I5621cc9807ffff8139ae8876250147f7b2c76759
diff --git a/include/lib/xlat_tables/xlat_tables_compat.h b/include/lib/xlat_tables/xlat_tables_compat.h
index 90768db..5f28195 100644
--- a/include/lib/xlat_tables/xlat_tables_compat.h
+++ b/include/lib/xlat_tables/xlat_tables_compat.h
@@ -1,11 +1,16 @@
 /*
- * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2018-2022, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
+#ifndef XLAT_TABLES_COMPAT_H
+#define XLAT_TABLES_COMPAT_H
+
 #if XLAT_TABLES_LIB_V2
 #include <lib/xlat_tables/xlat_tables_v2.h>
 #else
 #include <lib/xlat_tables/xlat_tables.h>
 #endif
+
+#endif /* XLAT_TABLES_COMPAT_H */