Freddie Mac (FRE) is trying to fend off Bank of America Corp. (BAC) from probing its business relationship with failed lender Taylor Bean & Whitaker Mortgage Corp. in an investigation Freddie says would ring up at least a $10 million tab. Freddie Mac is urging the U.S. Bankruptcy Court in Jacksonville, Fla., not to allow Bank of America to carry out an investigation that it says is both too broad and too costly. “The breadth of the discovery sought by BoA is so vast that Freddie Mac …