UefiCpuPkg: Fix typos in comments

- excute -> execute
- Retrive -> Retrieve
- possilbe -> possible
- CONTINOUS -> CONTINUOUS
- storgage -> storage
- allcated -> allocated
- triggerred -> triggered
- paramter -> parameter
- perodically -> periodically
- retore -> restore

v2:
- ruturn -> return

Cc: Jeff Fan <jeff.fan@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Gary Lin <glin@suse.com>
Reviewed-by: Jeff Fan <jeff.fan@intel.com>

UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiDxeSmmCpuException.c

@@ -65,7 +65,7 @@ CommonExceptionHandlerWorker (
       //
       if (ReservedVectors[ExceptionType].ApicId == GetApicId ()) {
         //
-        // Old IDT handler has been executed, then retore CPU exception content to
+        // Old IDT handler has been executed, then restore CPU exception content to
         // run new exception handler.
         //
         ArchRestoreExceptionContext (ExceptionType, SystemContext);

UefiCpuPkg/Library/MpInitLib/DxeMpLib.c

@@ -172,7 +172,7 @@ CheckAndUpdateApsStatus (
 /**
   Checks APs' status periodically.
 
-  This function is triggerred by timer perodically to check the
+  This function is triggered by timer periodically to check the
   state of APs for StartupAllAPs() and StartupThisAP() executed
   in non-blocking mode.
 

UefiCpuPkg/Library/MtrrLib/MtrrLib.c

@@ -606,7 +606,7 @@ MtrrGetMemoryAttributeInVariableMtrrWorker (
   @param[in]   MtrrValidAddressMask  The valid address mask for MTRR
   @param[out]  VariableMtrr          The array to shadow variable MTRRs content
 
-  @return                       The return value of this paramter indicates the
+  @return                       The return value of this parameter indicates the
                                 number of MTRRs which has been used.
 
 **/