cppcheck: Changes to enable scanning codebase without silent errors

Amend the library config file and the suppression list to be able
to scan the codebase as desired without silently failing due to
invalid configurations.

Signed-off-by: Antonio de Angelis <antonio.deangelis@arm.com>
Change-Id: Ia4585283958a1579f4895553a83db6d338d9fad6
2 files changed