UBIFS: rename dumping functions

This commit re-names all functions which dump something from "dbg_dump_*()" to
"ubifs_dump_*()". This is done for consistency with UBI and because this way it
will be more logical once we remove the debugging sompilation option.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
diff --git a/fs/ubifs/commit.c b/fs/ubifs/commit.c
index fb3b5c8..4f795d1 100644
--- a/fs/ubifs/commit.c
+++ b/fs/ubifs/commit.c
@@ -715,13 +715,13 @@
 
 out_dump:
 	dbg_err("dumping index node (iip=%d)", i->iip);
-	dbg_dump_node(c, idx);
+	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");
-		dbg_dump_node(c, &i->idx);
+		ubifs_dump_node(c, &i->idx);
 	}
 out_free:
 	while (!list_empty(&list)) {