(Adds details) By Matt Smith DUBAI, Nov 22 (Reuters) - Rory McIlroy won Dubai's DP World Tour Championship on Sunday, overhauling overnight leader Andy Sullivan with four birdies on the back nine to also be crowned Europe's top money earner for a third year in four. Playing partner Sullivan's 68 left him on 268, one stroke short despite stretching his advantage early on. The world number 53 birdied two of the first four holes, McIlroy carding a bogey and a birdie over the same stretch to extend the 28-year-old's lead to three strokes. More...