Sorry for the late response. Yes, just found it in MLK's book that MLK disagreed with Fanon. He didn't like that Fanon said, "that violence is a psychologically healthy and tactically sound method or the oppressed. [...] these young American Negroes, who are predominantly involved in the Black Power movement, often quote Fanon's belief that vioelnce is the only thing that will bring about liberation."
Found on page 56/57 if you're interested in reading the section.
Anyway, I haven't finished reading the book yet. But I intend to write an article expressing his views once I am done.