UBIFS: do not treat all data as short term

UBIFS wrongly tells UBI that all data is short term. Use proper
hints instead. Thanks to Xiaochuan-Xu for noticing this.
Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com>

fs/ubifs/journal.c

@@ -208,7 +208,7 @@ static int reserve_space(struct ubifs_info *c, int jhead, int len)
 	offs = 0;
 
 out:
-	err = ubifs_wbuf_seek_nolock(wbuf, lnum, offs, UBI_SHORTTERM);
+	err = ubifs_wbuf_seek_nolock(wbuf, lnum, offs, wbuf->dtype);
 	if (err)
 		goto out_unlock;