MdeModulePkg: Change OPTIONAL keyword usage style

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3760

Update all use of ', OPTIONAL' to ' OPTIONAL,' for function params.

Cc: Andrew Fish <afish@apple.com>
Cc: Leif Lindholm <leif@nuviainc.com>
Cc: Michael Kubacki <michael.kubacki@microsoft.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>

MdeModulePkg/Include/Guid/PerformanceMeasurement.h

@@ -53,11 +53,11 @@ typedef enum {
 typedef
 EFI_STATUS
 (EFIAPI *CREATE_PERFORMANCE_MEASUREMENT)(
-  IN CONST VOID                        *CallerIdentifier, OPTIONAL
-  IN CONST VOID                        *Guid,     OPTIONAL
-  IN CONST CHAR8                       *String,   OPTIONAL
-  IN       UINT64                      TimeStamp, OPTIONAL
-  IN       UINT64                      Address,   OPTIONAL
+  IN CONST VOID                        *CallerIdentifier  OPTIONAL,
+  IN CONST VOID                        *Guid      OPTIONAL,
+  IN CONST CHAR8                       *String    OPTIONAL,
+  IN       UINT64                      TimeStamp  OPTIONAL,
+  IN       UINT64                      Address    OPTIONAL,
   IN       UINT32                      Identifier,
   IN       PERF_MEASUREMENT_ATTRIBUTE  Attribute
   );