WASHINGTON — The Federal Communications Commission said on Monday it approved Time Warner’s sale of a broadcast station in Atlanta to Des Moines-based Meredith Corp., a transaction that could help speed Time Warner’s planned merger with AT&T Inc.In January, AT&T said it expected to be able to bypass the FCC in its planned $85.4 billion acquisition of Time Warner because it would not seek to transfer any significant Time Warner licenses.FCC Chairman Ajit Pai said previously he did not plan to use the proposed TV station license transfer as a way to examine the AT&T-Time Warner merger.