Miley Cyrus’ dad, Billy Ray Cyrus, has “permanently destroyed” his relationship with his daughter after branding her a “devil” and a “skank” in a shocking audio rant. RadarOnline.com can reveal that Billy Ray, 62, admitted that it was his voice in an expletive-filled audio recording where he made derogatory remarks about Miley and his ex-wife, Firerose. The audio recording, which surfaced days after the Achy Breaky Heart singer publicly criticized his daughter, Miley, 31, seems to have irreparably damaged their relationship. He bizarrely spoke in the third person in the recording before turnin…