clang-tidy:openpower-dumps fix warning bugprone-

Fixed the bugprone-forward-declaration-namespace warning by including
the appropriate header file. This ensures that the forward declaration
and definition are in the same namespace, preventing namespace-related
issues.

Change-Id: If65f993252d6f24a529e626544affb80bbe3e6d5
Signed-off-by: Jayanth Othayoth <ojayanth@gmail.com>