Cleaner solution seems to be adding below lines under  [Rule.Common.DXE_DRIVER] in fdf file:
<div>&nbsp; &nbsp; RAW ACPI&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Optional&nbsp; &nbsp; |.acpi</div>
<div>&nbsp; &nbsp; RAW ASL&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Optional&nbsp; &nbsp; |.aml</div>