First round of PI enabling work:
1) PiPeiCis changes (CONST, EFI_PEI_FILE_HANDLE.. etc)
2) Make use of FirmwareVolume 2 protocol.
3) Verified for Nt32Pkg and real platform for S3.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3772 6f19259b-4bc3-4df7-8a09-765794883524