host-transport: pldm: fix antiquated header

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I5bb5644e00e28a41d8c38c4e68df99779927afe0
diff --git a/host-transport-extensions/pldm/default/pldm_interface.cpp b/host-transport-extensions/pldm/default/pldm_interface.cpp
index 09b96db..ff025e6 100644
--- a/host-transport-extensions/pldm/default/pldm_interface.cpp
+++ b/host-transport-extensions/pldm/default/pldm_interface.cpp
@@ -1,7 +1,6 @@
 // SPDX-License-Identifier: Apache-2.0
 
-#include <stdint.h>
-
+#include <cstdint>
 #include <stdexcept>
 
 namespace phosphor