libc: Add AArch32 and AArch64 headers

Change-Id: I4f58bb4660078c9bc76d2826c90b2fa711719a3e
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
diff --git a/include/lib/libc/limits.h b/include/lib/libc/limits.h
index df1a963..f6a4c7b 100644
--- a/include/lib/libc/limits.h
+++ b/include/lib/libc/limits.h
@@ -3,11 +3,15 @@
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
+/*
+ * Portions copyright (c) 2018, ARM Limited and Contributors.
+ * All rights reserved.
+ */
 
 #ifndef _LIMITS_H
 #define _LIMITS_H
 
-#include <arch/limits.h>
+#include <limits_.h>
 
 #define CHAR_BIT   8
 #define MB_LEN_MAX 1