Reserve driver used LUT slots in initialization

As two of the three reserved LUT slots are not populated when the device
is being probed, we need to make sure that these LUT slots will not be
allocated by client drivers before they are initialized during link up
handshake. Reserve all three reserved LUTs by increasing nr_rsvd_luts
by three when the device is being probed.

Author: kelvin-cao

ntb_hw_switchtec.c

@@ -720,7 +720,6 @@ static int switchtec_ntb_setup_crosslink(struct switchtec_ntb *sndev)
 
 		sndev->mmio_xlink_peer_ctrl = sndev->mmio_xlink_ctrl_win +
 			offset;
-		sndev->nr_rsvd_luts++;
 	}
 
 	if (!sndev->mmio_xlink_dbmsg_win) {
@@ -744,7 +743,6 @@ static int switchtec_ntb_setup_crosslink(struct switchtec_ntb *sndev)
 			return -ENOMEM;
 
 		sndev->mmio_peer_dbmsg = sndev->mmio_xlink_dbmsg_win + offset;
-		sndev->nr_rsvd_luts++;
 	}
 
 	crosslink_init_dbmsgs(sndev);
@@ -1515,6 +1513,7 @@ static int switchtec_ntb_init_crosslink(struct switchtec_ntb *sndev)
 		return -EINVAL;
 	}
 
+	sndev->nr_rsvd_luts += 3;
 	rc = crosslink_setup_mws(sndev, NT_INFO_LUT, DB_MSG_LUT, REQ_ID_LUT,
 				 &bar_addrs[1], bar_cnt - 1);
 	if (rc)
@@ -1540,7 +1539,6 @@ static int switchtec_ntb_init_crosslink(struct switchtec_ntb *sndev)
 	}
 
 	sndev->mmio_xlink_peer_ntb = sndev->mmio_xlink_ntinfo_win + offset;
-	sndev->nr_rsvd_luts++;
 
 	return 0;
 }