Un-expanded to expanded location code conversion

This commit implements an api to get expanded location code
from a given un-expanded location code and node number.

In case invalid argument is passed or the location code is
not found, corresponding error is returned to the caller.

Tested on simics.

To build use following command.
meson -Dibm-parser=enabled -Dvpd-manager=enabled build
ninja -C build

Sample bus call.
busctl call com.ibm.VPD.Manager /com/ibm/VPD/Manager com.ibm.VPD.Manager
GetExpandedLocationCode sq <locationCode> <nodeNumber>.

Signed-off-by: SunnySrivastava1984 <sunnsr25@in.ibm.com>
Change-Id: I52654a1c34d25dc9b861159a2ae1d15379b44677
diff --git a/types.hpp b/types.hpp
index 2b6dd06..bab4569 100644
--- a/types.hpp
+++ b/types.hpp
@@ -36,6 +36,8 @@
 using FruIsMotherboard = bool;
 using FrusMap =
     std::unordered_map<Path, std::pair<VPDfilepath, FruIsMotherboard>>;
+using LocationCode = std::string;
+using LocationCodeMap = std::unordered_map<Path, LocationCode>;
 
 using namespace std::string_literals;
 constexpr auto pimPath = "/xyz/openbmc_project/inventory";