By James Hibberd Writer-at-Large Andrew Garfield made a case for supporting the Harry Potter franchise — despite firmly disagreeing with saga author J.K. Rowling‘s trans views — while the author herself weighed in on HBO’s first teaser trailer for the TV reboot. The Amazing Spider-Man and The Social Network star was talking to Hits Radio when he first praised Daniel Radcliffe’s performance in Broadway’s Merrily We Roll Along, and then made a case for separating the art and the artist when it came to Harry Potter — particularly since thousands of other people also worked on the Warner Bros. films. “Daniel is so goddamn good,” Garfield says. “And honestly, I hadn’t watched [the Harry Potter films] until recently. He’s really good in those Harry Potter movies. Those Harry Potter movies are really good. I really liked them.…