dm: remove duplicate module name from error msgs

Remove explicit module name from messages as the macro now includes it
automatically.

Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index c0950a0..fc6c102 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -1352,15 +1352,14 @@
 
 	r = dm_register_target(&multipath_target);
 	if (r < 0) {
-		DMERR("%s: register failed %d", multipath_target.name, r);
+		DMERR("register failed %d", r);
 		kmem_cache_destroy(_mpio_cache);
 		return -EINVAL;
 	}
 
 	kmultipathd = create_workqueue("kmpathd");
 	if (!kmultipathd) {
-		DMERR("%s: failed to create workqueue kmpathd",
-				multipath_target.name);
+		DMERR("failed to create workqueue kmpathd");
 		dm_unregister_target(&multipath_target);
 		kmem_cache_destroy(_mpio_cache);
 		return -ENOMEM;
@@ -1381,8 +1380,7 @@
 
 	r = dm_unregister_target(&multipath_target);
 	if (r < 0)
-		DMERR("%s: target unregister failed %d",
-		      multipath_target.name, r);
+		DMERR("target unregister failed %d", r);
 	kmem_cache_destroy(_mpio_cache);
 }