UefiCpuPkg/PiSmmCpuDxeSmm: Pre-allocate PROCEDURE_TOKEN buffer

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2388

Token is new introduced by MM MP Protocol. Current logic allocate Token
every time when need to use it. The logic caused SMI latency raised to
very high. Update logic to allocate Token buffer at driver's entry point.
Later use the token from the allocated token buffer. Only when all the
buffer have been used, then need to allocate new buffer.

Former change (9caaa79dd7) missed
PROCEDURE_TOKEN part, this change covers it.

Reviewed-by: Ray Ni <ray.ni@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Eric Dong <eric.dong@intel.com>

UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h

@@ -214,6 +214,7 @@ typedef struct {
 
   SPIN_LOCK               *SpinLock;
   volatile UINT32         RunningApCount;
+  BOOLEAN                 Used;
 } PROCEDURE_TOKEN;
 
 #define PROCEDURE_TOKEN_FROM_LINK(a)  CR (a, PROCEDURE_TOKEN, Link, PROCEDURE_TOKEN_SIGNATURE)
@@ -254,11 +255,6 @@ typedef struct {
 
   PROCEDURE_WRAPPER               *ApWrapperFunc;
   LIST_ENTRY                      TokenList;
-
-  LIST_ENTRY                      OldTokenBufList;
-
-  UINT8                           *CurrentTokenBuf;
-  UINT32                          UsedTokenNum;     // Only record tokens used in CurrentTokenBuf.
 } SMM_CPU_PRIVATE_DATA;
 
 extern SMM_CPU_PRIVATE_DATA  *gSmmCpuPrivate;