Dick Broadcasting is ending its relationship with Nielsen Audio and subscribing with Eastlan Ratings to measure listenership in the Greensboro/Winston-Salem market. Dick, which owns Classic Rock "Rock 92" 92.3 WKRR Asheboro and CHR "107.5 KZL" WKZL Winston-Salem, becomes the first company in a PPM measured market to subscribe to a competing ratings service. In making