hw/arm/virt: pass VirtMachineState instead of VirtGuestInfo

hw/arm/virt: pass VirtMachineState instead of VirtGuestInfo

Only two functions take VirtGuestInfo parameters. Now that guest-info
is part of VirtMachineState, and VirtMachineState is defined in the
virt header, pass that instead.

Signed-off-by: Andrew Jones <[email protected]>
Reviewed-by: Igor Mammedov <[email protected]>
Acked-by: Michael S. Tsirkin <[email protected]>
Message-id: 20170102200153[email protected]
Reviewed-by: Peter Maydell <[email protected]>
Signed-off-by: Peter Maydell <[email protected]>