Houston (Tex.) St. Francis Episcopal School power forward Nigel Walls committed to SMU, he announced on Friday. The Mustangs beat out Auburn and TCU, who were the finalists. Ultimately, combined with head coach Andy Enfield’s background, SMU’s move to the ACC and more, the Mustangs won out. “I feel like they’ll be able to translate what they did at USC to SMU now that they’re going to the ACC,” Walls said of SMU. “Coach Enfield has a respectable coaching background of guys in the NBA while at USC. He’s really nice and I can tell he knows what he wants. The style of play is really the main thin…