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/SmbusHc.h

@@ -184,7 +184,7 @@ EFI_STATUS
 (EFIAPI *EFI_SMBUS_HC_PROTOCOL_ARP_DEVICE)(
   IN CONST  EFI_SMBUS_HC_PROTOCOL     *This,
   IN        BOOLEAN                   ArpAll,
-  IN        EFI_SMBUS_UDID            *SmbusUdid,   OPTIONAL
+  IN        EFI_SMBUS_UDID            *SmbusUdid    OPTIONAL,
   IN OUT    EFI_SMBUS_DEVICE_ADDRESS  *SlaveAddress OPTIONAL
 );
 
@@ -286,4 +286,3 @@ struct _EFI_SMBUS_HC_PROTOCOL {
 extern EFI_GUID gEfiSmbusHcProtocolGuid;
 
 #endif
-