To handle scsi RESERVATION CONFLICT properly in ahc driver.

Could somebody please update other drivers so that SCSI_RSVD (0x18)
to be handled just like SCSI_BUSY(0x08)?

There's no need for extra state, so we use XS_BUSY for SCSI_RSVD too.

PR:		4257

sys/i386/scsi/aic7xxx.c

@@ -39,7 +39,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *      $Id: aic7xxx.c,v 1.121 1997/08/13 17:02:43 gibbs Exp $
+ *      $Id: aic7xxx.c,v 1.122 1997/08/15 19:27:37 gibbs Exp $
  */
 /*
  * TODO:
@@ -1357,6 +1357,11 @@ ahc_handle_seqint(ahc, intstat)
 			sc_print_addr(xs->sc_link);
 			printf("Target Busy\n");
 			break;
+		case SCSI_RSVD:
+			xs->error = XS_BUSY;	/*XXX*/
+			sc_print_addr(xs->sc_link);
+			printf("Target Reserved\n");
+			break;
 		default:
 			sc_print_addr(xs->sc_link);
 			printf("unexpected targ_status: %x\n", hscb->status);