common: code re-org

Move common files under a common/ directory.

Signed-off-by: Deepak Kodihalli <dkodihal@in.ibm.com>
Change-Id: I0eaf91d4ee94c1e78228da0c50892f82e91912fa
diff --git a/libpldmresponder/pdr.hpp b/libpldmresponder/pdr.hpp
index a2a066f..c6f05a2 100644
--- a/libpldmresponder/pdr.hpp
+++ b/libpldmresponder/pdr.hpp
@@ -1,7 +1,7 @@
 #pragma once
 
+#include "common/utils.hpp"
 #include "libpldmresponder/pdr_utils.hpp"
-#include "utils.hpp"
 
 #include <stdint.h>