hw/scsi/lsi53c895a: Fix typo in comment

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

hw/scsi/lsi53c895a.c

@@ -225,7 +225,7 @@ struct LSIState {
     MemoryRegion io_io;
     AddressSpace pci_io_as;
 
-    int carry; /* ??? Should this be an a visible register somewhere?  */
+    int carry; /* ??? Should this be in a visible register somewhere?  */
     int status;
     int msg_action;
     int msg_len;