scsi: smartpqi: Use shost_to_hba() in pqi_scan_finished()

shost_to_hba() is used everywhere except to obtain pqi_ctrl_info from
shosti, except in pqi_scan_finished(), where shost_priv() is used.  This
causes one pointer dereference to be missed, as shost->hostdata is a
pointer in smartpqi. Fix it.

Fixes: 6c22376 ("smartpqi: initial commit of Microsemi smartpqi driver")
Signed-off-by: Martin Wilck <martin.wilck@suse.com>
Reviewed-by: Don Brace <don.brace@microchip.com>
Cc: Don Brace <don.brace@microchip.com>
Cc: storagedev@microchip.com
Cc: stable@vger.kernel.org
Reviewed-by: Hannes Reinecke <hare@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20260513174236.430465-2-mwilck@suse.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Author: Martin Wilck

drivers/scsi/smartpqi/smartpqi_init.c

@@ -2642,7 +2642,7 @@ static int pqi_scan_finished(struct Scsi_Host *shost,
 {
 	struct pqi_ctrl_info *ctrl_info;
 
-	ctrl_info = shost_priv(shost);
+	ctrl_info = shost_to_hba(shost);
 
 	return !mutex_is_locked(&ctrl_info->scan_mutex);
 }