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/platform.cpp b/libpldmresponder/platform.cpp
index 569977a..1e13754 100644
--- a/libpldmresponder/platform.cpp
+++ b/libpldmresponder/platform.cpp
@@ -1,12 +1,12 @@
 
 #include "platform.hpp"
 
+#include "common/utils.hpp"
 #include "event_parser.hpp"
 #include "pdr_numeric_effecter.hpp"
 #include "pdr_state_effecter.hpp"
 #include "platform_numeric_effecter.hpp"
 #include "platform_state_effecter.hpp"
-#include "utils.hpp"
 
 namespace pldm
 {