CryptoPkg: 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>

CryptoPkg/Library/BaseCryptLib/Pk/CryptX509Null.c

@@ -175,7 +175,7 @@ EFIAPI
 X509GetCommonName (
   IN      CONST UINT8  *Cert,
   IN      UINTN        CertSize,
-  OUT     CHAR8        *CommonName,  OPTIONAL
+  OUT     CHAR8        *CommonName   OPTIONAL,
   IN OUT  UINTN        *CommonNameSize
   )
 {
@@ -207,7 +207,7 @@ EFIAPI
 X509GetOrganizationName (
   IN      CONST UINT8   *Cert,
   IN      UINTN         CertSize,
-  OUT     CHAR8         *NameBuffer,  OPTIONAL
+  OUT     CHAR8         *NameBuffer   OPTIONAL,
   IN OUT  UINTN         *NameBufferSize
   )
 {