ofnode: Use 4K for a default tree-size

At some point it would be nice to have the ofnode API automatically
expand the tree as required, to accommodate new nodes. For now, expand
the default size so that UPL can be supported.

Signed-off-by: Simon Glass <sjg@chromium.org>

drivers/core/ofnode.c

@@ -118,7 +118,7 @@ int oftree_new(oftree *treep)
 			return log_msg_ret("liv", ret);
 		tree = oftree_from_np(root);
 	} else {
-		const int size = 1024;
+		const int size = 4096;
 		void *fdt;
 
 		ret = check_tree_count();