MinPlatformPkg: Move TpmPlatformHierarchyLib definition

Move library definition inside the Include/Dsc directory, so that boards
are not required to explicitly declare this common library.

Cc: Chasel Chiu <chasel.chiu@intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Eric Dong <eric.dong@intel.com>
Signed-off-by: Benjamin Doron <benjamin.doron00@gmail.com>
Reviewed-by: Nate DeSimone <nathaniel.l.desimone@intel.com>