pvscsi: fix the comment about lun enumeration

The comment in pvscsi_scan_target (presumably c&p-ed from another
driver) reads that REPORTS LUNS should better be used to enumerate the
luns on the target.

However, according to the Linux driver, the device supports no more than
a single lun per target.

So adjust the comment to tell exactly that.

Signed-off-by: Roman Kagan <rkagan@virtuozzo.com>
diff --git a/src/hw/pvscsi.c b/src/hw/pvscsi.c
index cd4046c..7c850a9 100644
--- a/src/hw/pvscsi.c
+++ b/src/hw/pvscsi.c
@@ -290,7 +290,7 @@
 pvscsi_scan_target(struct pci_device *pci, void *iobase,
                    struct pvscsi_ring_dsc_s *ring_dsc, u8 target)
-    /* TODO: send REPORT LUNS.  For now, only LUN 0 is recognized.  */
+    /* pvscsi has no more than a single lun per target */
     pvscsi_add_lun(pci, iobase, ring_dsc, target, 0);