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/pldmd/dbus_impl_pdr.cpp b/pldmd/dbus_impl_pdr.cpp
index 804a360..06e3cdd 100644
--- a/pldmd/dbus_impl_pdr.cpp
+++ b/pldmd/dbus_impl_pdr.cpp
@@ -3,7 +3,7 @@
 #include "libpldm/pdr.h"
 #include "libpldm/pldm_types.h"
 
-#include "utils.hpp"
+#include "common/utils.hpp"
 #include "xyz/openbmc_project/Common/error.hpp"
 
 #include <iostream>