NetworkPkg: 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: Maciej Rabeda <maciej.rabeda@linux.intel.com>

NetworkPkg/TlsDxe/TlsConfigProtocol.c

@@ -105,7 +105,7 @@ EFIAPI
 TlsConfigurationGetData (
   IN     EFI_TLS_CONFIGURATION_PROTOCOL  *This,
   IN     EFI_TLS_CONFIG_DATA_TYPE        DataType,
-  IN OUT VOID                            *Data, OPTIONAL
+  IN OUT VOID                            *Data  OPTIONAL,
   IN OUT UINTN                           *DataSize
   )
 {
@@ -144,4 +144,3 @@ TlsConfigurationGetData (
   gBS->RestoreTPL (OldTpl);
   return Status;
 }
-