DynamicTablesPkg: Fix issues reported by EDKII CI

DynamicTablesPkg: Fix issues reported by EDKII CI

The TianoCore EDKII project has introduced a Core CI infrastructure
using TianoCore EDKII Tools PIP modules:
* https://pypi.org/project/edk2-pytool-library/
* https://pypi.org/project/edk2-pytool-extensions/

More information on configuring the environment and running the
builds can be found in edk2\.pytool\Readme.md

This patch fixes the issues reported by the CI system mainly around
fixing typo errors and package dec and dsc files. A subsequent patch
enables the CI builds for the DynamicTablesPkg.

Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
Reviewed-by: Alexei Fedorov <Alexei.Fedorov@arm.com>