Intel Corp. has shortlisted a number of buyout firms for the next round of bidding for its Altera unit, according to people familiar with the matter, as the beleaguered chipmaker makes headway on a process started by its now ousted chief executive officer.Private equity firms including Francisco Partners and Silver Lake Management are competing alongside Lattice Semiconductor Corp. in a second round for Altera, which specializes in the design of low-power programmable chips, the people said, ask...