Mike Brown was prescient. Then he was critical.  After the Knicks bludgeoned the 76ers in Game 1, fouling was the one area he specifically noted they had to improve. It seemed like a footnote in what was otherwise a historic blowout.  But in their 108-102 Game 2 win Wednesday night at Madison Square Garden, it became a central storyline. It had Brown doing math at the podium while questioning the officiating.  “We have to try to do something about it, because they’re killing us from the free-throw line in this series,” Brown said. “I know it’s only two games, but they had 34 [free throws in Game 1] and 28 tonight. So let’s add them up now. That’s 62, and we had 17 and 25, so that’s 42, right? Forty-two to 62. So, we have to do something right. I have to do a better job addressing it.…