For those who have followed Kirk Ferentz over the years, one of his least favorite topics is probably quarterback controversies. But, he might have a full blown on following Iowa’s 40-14 win over Northwestern. Former Wildcat quarterback and current Hawkeye, Brendan Sullivan came off the bench and lead Iowa to the win. Ferentz discusses the change, the plan going into today for the quarterback position and much more. KIRK FERENTZ: Obviously, really good to get the win. It was hard-fought. Really proud of our guys. Nothing was easy today. Anticipated that coming in. As much as anything, impresse…