staging: lustre: lmv: replace obd_free_memmd with lmv_free_memmd

Use lmv_free_memmd for proper cleanup instead of
the generic obd_free_memmd.
Signed-off-by: wang di <di.wang@intel.com>
Reviewed-on: http://review.whamcloud.com/7043
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3531Reviewed-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: Jinshan Xiong <jinshan.xiong@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/lmv/lmv_obd.c

@@ -2692,7 +2692,7 @@ static int lmv_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
 	struct lmv_tgt_desc *tgt = lmv->tgts[0];
 
 	if (md->lmv)
-		obd_free_memmd(exp, (void *)&md->lmv);
+		lmv_free_memmd(md->lmv);
 	if (!tgt || !tgt->ltd_exp)
 		return -EINVAL;
 	return md_free_lustre_md(tgt->ltd_exp, md);