IntelFsp2WrapperPkg: SecFspWrapperPlatformSecLibSample support for X64

IntelFsp2WrapperPkg: SecFspWrapperPlatformSecLibSample support for X64

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3893
1.Added SecFspWrapperPlatformSecLibSample support for X64.
2.Adopted FSPT_ARCH2_UPD in SecFspWrapperPlatformSecLibSample.
3.Moved Fsp.h up one level to be shared across IA32 and X64.

Cc: Chasel Chiu <chasel.chiu@intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Ashraf Ali S <ashraf.ali.s@intel.com>
Signed-off-by: Ted Kuo <ted.kuo@intel.com>
Reviewed-by: Chasel Chiu <chasel.chiu@intel.com>
Reviewed-by: Nate DeSimone <nathaniel.l.desimone@intel.com>