IntelFsp2Pkg: BaseCacheLib EfiProgramMtrr MtrrNumber Should be UINT32

IntelFsp2Pkg: BaseCacheLib EfiProgramMtrr MtrrNumber Should be UINT32

REF:https://bugzilla.tianocore.org/show_bug.cgi?id=3485

CacheLib EfiProgramMtrr Function takes MTRR number as a input parameter,
in the function the parameter is defined as UINTN were as the caller
calling MTTR number in UINT32.

Signed-off-by: Ashraf Ali S <ashraf.ali.s@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Chasel Chiu <chasel.chiu@intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Digant H Solanki <digant.h.solanki@intel.com>
Cc: Sangeetha V <sangeetha.v@intel.com>
Reviewed-by: Chasel Chiu <chasel.chiu@intel.com>