HAMBURG (Reuters) – Volkswagen’s supervisory board has called on management to present a reworked plan for the carmaker’s software division, which forms the backbone of its strategy but has run into problems, two people familiar with the matter said. The board is expecting an update at the last supervisory board meeting before the summer break, one of the people said, adding no date has been set yet. “What the board has presented is not enough,” said the other person. Volkswagen declined to comment. Volkswagen has called its software division, which is the central element in its autonomous dri…