LOS ANGELES — Penn State coach James Franklin strolled into his postgame news conference here with a smile from ear to ear. It was easy to understand why. His team had just come from behind to beat USC 33-30 on a walk-off field goal by redshirt freshman Ryan Barker. He started with an opening statement “I thought once we got going and started making some plays, you could feel our Penn State presence in the stadium, which was awesome,” Franklin said. “I haven’t been a part of too many games where you lose the turnover battle like that and still win. It’s something we take a lot of pride in, and…