Multi-queue virtio-scsi uses a different scsi_host_template struct.  Add
the .device_alloc field there, too.
Fixes: 25d1d50e23275e141e3a3fe06c25a99f4c4bf4e0
Cc: stable@vger.kernel.org
Cc: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
        .eh_abort_handler = virtscsi_abort,
        .eh_device_reset_handler = virtscsi_device_reset,
        .eh_timed_out = virtscsi_eh_timed_out,
+       .slave_alloc = virtscsi_device_alloc,
 
        .can_queue = 1024,
        .dma_boundary = UINT_MAX,