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/nvidia/tegra/include/drivers/memctrl_v2.h b/plat/nvidia/tegra/include/drivers/memctrl_v2.h
index 60c8a04..b72653e 100644
--- a/plat/nvidia/tegra/include/drivers/memctrl_v2.h
+++ b/plat/nvidia/tegra/include/drivers/memctrl_v2.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -11,7 +11,7 @@
 
 #ifndef __ASSEMBLY__
 
-#include <sys/types.h>
+#include <stdint.h>
 
 /*******************************************************************************
  * StreamID to indicate no SMMU translations (requests to be steered on the