By Svea Herbst-Bayliss and Greg Roumeliotis (Reuters) – Walt Disney Co has secured enough shareholder votes to defeat a challenge against its board mounted by Nelson Peltz’s hedge fund Trian Fund Management, people familiar with the matter said on Tuesday. Enough votes had been cast as of Tuesday evening to put Disney’s board directors safely ahead of Trian’s two challengers, that included Peltz and former Disney chief financial officer Jay …