IntelFsp2Pkg/FspSecCore: Use UefiCpuLib.

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2825

UefiCpuLib has API InitializeFloatingPointUnits.
Remove internal copy of InitializeFloatingPointUnits
in FspSecCoreM, use UefiCpuLib API.

This change also avoid later potential conflict when
use UefiCpuLib for FspSecCoreM module.

Signed-off-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Chasel Chiu <chasel.chiu@intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Star Zeng <star.zeng@intel.com>

IntelFsp2Pkg/FspSecCore/FspSecCoreM.inf

@@ -29,7 +29,6 @@
 
 [Sources.IA32]
   Ia32/Stack.nasm
-  Ia32/InitializeFpu.nasm
   Ia32/FspApiEntryM.nasm
   Ia32/FspApiEntryCommon.nasm
   Ia32/FspHelper.nasm
@@ -41,6 +40,7 @@
 [Packages]
   MdePkg/MdePkg.dec
   IntelFsp2Pkg/IntelFsp2Pkg.dec
+  UefiCpuPkg/UefiCpuPkg.dec
 
 [LibraryClasses]
   BaseMemoryLib
@@ -51,6 +51,7 @@
   FspSwitchStackLib
   FspCommonLib
   FspSecPlatformLib
+  UefiCpuLib
 
 [Pcd]
   gIntelFsp2PkgTokenSpaceGuid.PcdTemporaryRamBase              ## CONSUMES