GO9P* scripts should use qemu q35 machine when using kvm

[gmacd]

If kvm is enabled, the GO9P* scripts use the older 'pc' machine config, rather than the newer q35 config. This means we don't have an ahci device amongst other things. Switching to q35 to have a more modern config (and ahci).

A couple of consequences of the change:

• The default qemu config has a dvd drive. This seems to cause a couple of i/o errors to show up in harvey.
• We can now attach images as drives by adding the following lines to the qemu line in GO9P*:

  -drive id=disk,file=harveyhd.img,if=none \
  -device ahci,id=ahci \
  -device ide-,drive=disk,bus=ahci.0 \

  These will now be picked up by devsd.

Signed-off-by: Graham MacDonald grahamamacdonald@gmail.com