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/CryptPkcs1Oaep.c

@@ -50,8 +50,8 @@ Pkcs1v2Encrypt (
   IN   UINTN        PublicKeySize,
   IN   UINT8        *InData,
   IN   UINTN        InDataSize,
-  IN   CONST UINT8  *PrngSeed,  OPTIONAL
-  IN   UINTN        PrngSeedSize,  OPTIONAL
+  IN   CONST UINT8  *PrngSeed   OPTIONAL,
+  IN   UINTN        PrngSeedSize   OPTIONAL,
   OUT  UINT8        **EncryptedData,
   OUT  UINTN        *EncryptedDataSize
   )
@@ -205,4 +205,3 @@ _Exit:
 
   return Result;
 }
-