Revert "Fix id3v1 tag spelling."

The misspelling is used in the specification.

This reverts commit 95016fd1c8.

libavformat/id3v1.c

@@ -91,7 +91,7 @@ const char * const ff_id3v1_genre_str[ID3v1_GENRE_MAX + 1] = {
      [64] = "Native American",
      [65] = "Cabaret",
      [66] = "New Wave",
-     [67] = "Psychedelic",
+     [67] = "Psychadelic",
      [68] = "Rave",
      [69] = "Showtunes",
      [70] = "Trailer",