clang-tidy: fix use of undeclared identifier error

This commit resolves the clang-diagnostic-error related to
missing identifiers by ensuring all necessary header files
are included in the same source file.

Also Correct undeclared identifier 'cmdWildcard' to
'ipmi::cmdWildcard'

Change-Id: Ic818af97557c7bc74b7fc9478315fe181a9a4cfc
Signed-off-by: Jayanth Othayoth <ojayanth@gmail.com>
diff --git a/include/ipmid/sessiondef.hpp b/include/ipmid/sessiondef.hpp
index ac63f8f..0311c91 100644
--- a/include/ipmid/sessiondef.hpp
+++ b/include/ipmid/sessiondef.hpp
@@ -16,6 +16,9 @@
  */
 #pragma once
 
+#include <stddef.h>
+#include <stdint.h>
+
 namespace session
 {