UBIFS: get rid of dbg_err

This patch removes the 'dbg_err()' macro and we now use 'ubifs_err()' instead.
The idea of 'dbg_err()' was to compile out some error message to make the
binary a bit smaller - but I think it was a bad idea.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
diff --git a/fs/ubifs/commit.c b/fs/ubifs/commit.c
index 5da20c19..8eda717 100644
--- a/fs/ubifs/commit.c
+++ b/fs/ubifs/commit.c
@@ -716,13 +716,13 @@
 	return 0;
 
 out_dump:
-	dbg_err("dumping index node (iip=%d)", i->iip);
+	ubifs_err("dumping index node (iip=%d)", i->iip);
 	ubifs_dump_node(c, idx);
 	list_del(&i->list);
 	kfree(i);
 	if (!list_empty(&list)) {
 		i = list_entry(list.prev, struct idx_node, list);
-		dbg_err("dumping parent index node");
+		ubifs_err("dumping parent index node");
 		ubifs_dump_node(c, &i->idx);
 	}
 out_free: