SecurityPkg: 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: Jian J Wang <jian.j.wang@intel.com>

SecurityPkg/Library/Tpm2CommandLib/Tpm2EnhancedAuthorization.c

@@ -90,7 +90,7 @@ EFIAPI
 Tpm2PolicySecret (
   IN      TPMI_DH_ENTITY            AuthHandle,
   IN      TPMI_SH_POLICY            PolicySession,
-  IN      TPMS_AUTH_COMMAND         *AuthSession, OPTIONAL
+  IN      TPMS_AUTH_COMMAND         *AuthSession  OPTIONAL,
   IN      TPM2B_NONCE               *NonceTPM,
   IN      TPM2B_DIGEST              *CpHashA,
   IN      TPM2B_NONCE               *PolicyRef,