MdePkg: 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>

MdePkg/Include/Protocol/Security2.h

@@ -80,7 +80,7 @@ typedef struct _EFI_SECURITY2_ARCH_PROTOCOL    EFI_SECURITY2_ARCH_PROTOCOL;
 **/
 typedef EFI_STATUS (EFIAPI *EFI_SECURITY2_FILE_AUTHENTICATION) (
   IN CONST EFI_SECURITY2_ARCH_PROTOCOL *This,
-  IN CONST EFI_DEVICE_PATH_PROTOCOL    *File, OPTIONAL
+  IN CONST EFI_DEVICE_PATH_PROTOCOL    *File  OPTIONAL,
   IN VOID                              *FileBuffer,
   IN UINTN                             FileSize,
   IN BOOLEAN                           BootPolicy