Add support for selecting harddrive order in boot menu.

Add support for selecting harddrive order in boot menu.

Save ATA harddrive model name so that it can be shown from menu.
Minor - use "ata0-1" not "ata0 slave".
Fill fdpt info based on BIOS drive id - not the controller id.
Add BCV support to IPL code.
Use "BCV" system to set harddrive order (for both ata and option roms).
Also, don't show floppy/cdrom in boot menu if no drives found.