i386: expose floppy drive CMOS type

i386: expose floppy drive CMOS type

Make it possible to query the CMOS type of a floppy drive outside of the
source file where it's defined.

It will allow to properly populate the corresponding ACPI objects and
thus enable Windows on BIOS-less systems to access the floppy drives.

Signed-off-by: Roman Kagan <[email protected]>
Cc: Igor Mammedov <[email protected]>
Cc: "Michael S. Tsirkin" <[email protected]>
Cc: Marcel Apfelbaum <[email protected]>
Cc: John Snow <[email protected]>
Cc: Laszlo Ersek <[email protected]>
Cc: Kevin O'Connor <[email protected]>
Reviewed-by: Michael S. Tsirkin <[email protected]>
Signed-off-by: Michael S. Tsirkin <[email protected]>