RAID Controller FQDD blank in config XML

In case of HDD is selected as boot device, empty FQDD was getting added to the config XML leading to schema error.
Even though there was no difference between the old and new config difference was getting reported by the process
leading to incorrect config XML import.
arrg, I added this default to RAID.Integrated.1-1 late in the game on that PR and that broke it. Thanks for fixing!