A view of the logo of SK Hynix at its headquarters in Seongnam, South Korea, April 25, 2016. REUTERS/Kim Hong-JiRegister now for FREE unlimited access to Reuters.comSEOUL, April 27 (Reuters) – South Korea’s SK Hynix Inc (000660.KS) on Wednesday posted a 116% jump in first-quarter earnings, supported by solid demand from server clients but slightly missing market expectations due to weaker demand for mobile chips.The world’s second-biggest memory chipmaker said its operating profit rose to 2.9 trillion won ($2.