WIP - Encode/decode APIs for NSM Inventory information

Added APIs to encode and decode NSM type 3 inventory information with
unit tests.

Change-Id: I9e5afbe356b64fd7ae4f7a2a65043f3eeffa3807
Signed-off-by: Rohit PAI <ropai@nvidia.com>
diff --git a/src/nvidia-gpu/tests/meson.build b/src/nvidia-gpu/tests/meson.build
index 4923868..99ed721 100644
--- a/src/nvidia-gpu/tests/meson.build
+++ b/src/nvidia-gpu/tests/meson.build
@@ -19,6 +19,7 @@
     executable(
         'nvidiagpusensor_test',
         'NvidiaGpuSensorTest.cpp',
+        'NvidiaDeviceInventoryMctpVdm.cpp',
         '../OcpMctpVdm.cpp',
         '../NvidiaGpuMctpVdm.cpp',
         implicit_include_directories: false,