libata: Fix EH merge difference between this branch and upstream.
diff --git a/drivers/scsi/libata.h b/drivers/scsi/libata.h
index 652c08e..b18d377 100644
--- a/drivers/scsi/libata.h
+++ b/drivers/scsi/libata.h
@@ -105,5 +105,6 @@
 
 /* libata-eh.c */
 extern enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd);
+extern void ata_scsi_error(struct Scsi_Host *host);
 
 #endif /* __LIBATA_H__ */