By Alex Prewitt The 35-year-old bid farewell to the Olympics with a fourth-place finish and a feeling of content as he ceded the stage to a talented next generation. ZHANGJIAKOU — When it was all almost over, before his voice cracked and his eyes welled as red as his racing bib, Shaun White stood near the bottom of the halfpipe at Genting Snow Park, soaking up the scene. It was a private, peaceful moment, away from the cameras angling for shots and the volunteers clamoring for selfies, just White and his snowboarding coach and his physical therapist and the coming end of his career. “One more,…