Johnny Knoxville expressed well wishes for his former “Jackass” co-star Bam Margera, who reportedly left rehab multiple times this year. Margera named Knoxville in a lawsuit last year, claiming he was wrongfully terminated from the latest “Jackass” movie, before dropping the suit in April. “It boils down to: I love Bam,” Knoxville told Variety in an interview published Wednesday. “I know that a lot has happened. I just want him to get well for himself and his family. I love the guy, and I want him to get well and stay well.” Knoxville, who co-created the “Jackass” franchise that began with a s…