libpldm : Fix ver32 encoding declaration

This commit would attempt to fix the wrongly captured
ver32 structure declaration in libpldm & impacted test
cases.

Resolves : https://github.com/openbmc/pldm/issues/27



Signed-off-by: Manojkiran Eda <manojkiran.eda@gmail.com>
Change-Id: I9dccd4377bb1ef0e7738527ff154fd75f6277f39