Code refactoring

Moved all the constants to const.hpp and utility method to
utils.cpp/hpp.
Removed file ibm_vpd_type_check.cpp/hpp and keyword_vpd_types.hpp.

Signed-off-by: SunnySrivastava1984 <sunnsr25@in.ibm.com>
Change-Id: Ie7b54e6fd03a499fab7c3124e17292c6d525e471
diff --git a/types.hpp b/types.hpp
index d48b317..5ff2959 100644
--- a/types.hpp
+++ b/types.hpp
@@ -43,6 +43,7 @@
 using namespace std::string_literals;
 constexpr auto pimPath = "/xyz/openbmc_project/inventory";
 constexpr auto pimIntf = "xyz.openbmc_project.Inventory.Manager";
+using KeywordVpdMap = std::unordered_map<std::string, Binary>;
 
 } // namespace inventory