libc: Fix all includes in codebase

The codebase was using non-standard headers. It is needed to replace
them by the correct ones so that we can use the new libc headers.

Change-Id: I530f71d9510cb036e69fe79823c8230afe890b9d
Acked-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
diff --git a/plat/qemu/topology.c b/plat/qemu/topology.c
index d7ba9b7..569d15f 100644
--- a/plat/qemu/topology.c
+++ b/plat/qemu/topology.c
@@ -1,12 +1,12 @@
 /*
- * Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
 #include <arch.h>
 #include <platform_def.h>
-#include <sys/types.h>
+#include <stdint.h>
 #include "qemu_private.h"
 
 /* The power domain tree descriptor */