qemu_vm: correct param name from driver_format to drive_format

[yanan-fu]

The correct parameter name should be drive_name that be defined in configuration files

ID：1582

Signed-off-by: Yanan Fu [email protected]

[yanan-fu]

@YongxueHong @PaulYuuu Call for your review , thanks ! No specified failed cases , just notice it during code review.

In theory, it affect the pci bus for the cdrom.

[yanan-fu]

Mark it as draft, do not merge it.

Although the change is full sure correct, but need investigate more about the possible regression issues which can work with the wrong setting before.