Vlv2TbltDevicePkg/PlatformDxe: Use S3BootScriptWidth enums

Update to use S3BootScriptWidth enum values instead of
EfiBootScriptWidth enum values when calling S3BootScriptLib
services.  This fixes an XCODE5 build failure.

Cc: Zailiang Sun <zailiang.sun@intel.com>
Cc: Yi Qian <yi.qian@intel.com>
Cc: Gary Lin <glin@suse.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Zailiang Sun <zailiang.sun@intel.com>
Reviewed-by: Gary Lin <glin@suse.com>