KKR & Co. is in talks to buy ST Telemedia Global Data Centres in a deal that could value the Asian digital infrastructure provider at more than $5 billion, according to people familiar with the matter.The US investment firm and ST Telemedia Pte could reach a deal in the coming weeks, the people said. KKR is already a backer in the closely held data center company known as STT GDC with a 14.1% stake. At a more than $5 billion valuation, the deal could be among the largest for KKR this year, accor...