Include fixups (headers moves to private directory)

Signed-off-by: Anton Matkin <anton.matkin@arm.com>
diff --git a/programs/x509/cert_req.c b/programs/x509/cert_req.c
index 02fd567..c20f08d 100644
--- a/programs/x509/cert_req.c
+++ b/programs/x509/cert_req.c
@@ -29,8 +29,8 @@
 #else
 
 #include "mbedtls/x509_csr.h"
-#include "mbedtls/entropy.h"
-#include "mbedtls/ctr_drbg.h"
+#include "mbedtls/private/entropy.h"
+#include "mbedtls/private/ctr_drbg.h"
 #include "mbedtls/error.h"
 
 #include <stdio.h>