virtio_scsi: move to uapi

Guests need to use virtio scsi API, so export it to uapi,
nice to e.g. qemu and will help us remember this file
affects ABI.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/include/linux/virtio_scsi.h b/include/uapi/linux/virtio_scsi.h
similarity index 100%
rename from include/linux/virtio_scsi.h
rename to include/uapi/linux/virtio_scsi.h