CoffeelakeSiliconPkg/Pch: Add PEI private library instances

REF:https://bugzilla.tianocore.org/show_bug.cgi?id=2082



Adds PCH PEI private library class instances. These library instances
may be compatible with other boot phases as indicated by the library type.

* PeiDxeSmmGpioPrivateLibCnl
* PeiDxeSmmPchDmiLib
* PeiDxeSmmPchDmiWithS3Lib
* PeiDxeSmmPchInitCommonLib
* PeiDxeSmmPchPciExpressHelpersLib
* PeiDxeSmmPchPsfPrivateLibCnl
* PeiDxeSmmPmcPrivateLibCnl
* PeiDxeSmmPmcPrivateLibWithS3
* PeiGpioHelpersLib
* PeiGpioNameBufferLib
* PeiPmcPrivateLibCnl

Cc: Sai Chaganty <rangasai.v.chaganty@intel.com>
Cc: Chasel Chiu <chasel.chiu@intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Ankit Sinha <ankit.sinha@intel.com>
Signed-off-by: Michael Kubacki <michael.a.kubacki@intel.com>
Reviewed-by: Chasel Chiu <chasel.chiu@intel.com>
Reviewed-by: Nate DeSimone <nathaniel.l.desimone@intel.com>
Reviewed-by: Ankit Sinha <ankit.sinha@intel.com>