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/lib/xlat_tables/aarch64/xlat_tables.c b/lib/xlat_tables/aarch64/xlat_tables.c
index d88d7b1..4afdeed 100644
--- a/lib/xlat_tables/aarch64/xlat_tables.c
+++ b/lib/xlat_tables/aarch64/xlat_tables.c
@@ -10,7 +10,7 @@
 #include <bl_common.h>
 #include <common_def.h>
 #include <platform_def.h>
-#include <sys/types.h>
+#include <stdint.h>
 #include <utils.h>
 #include <xlat_tables.h>
 #include <xlat_tables_arch.h>