scsi: virtio_scsi: always read VPD pages for multiqueue too

Multi-queue virtio-scsi uses a different scsi_host_template struct. Add
the .device_alloc field there, too.

Fixes: 25d1d50e23275e141e3a3fe06c25a99f4c4bf4e0
Cc: [e-mail]
Cc: David Gibson <[e-mail]>
Signed-off-by: Paolo Bonzini <[e-mail]>
Reviewed-by: Fam Zheng <[e-mail]>
Reviewed-by: Stefan Hajnoczi <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/virtio_scsi.c

···
 	.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,