(Reuters) -Arm Holdings' lawsuit against Qualcomm ended in a mistrial on Friday, with a jury delivering a mixed verdict that found for Qualcomm on a crucial issue, saying Qualcomm had properly licensed its central processor chips. Arm's shares were down 1.8% in extended trading after the news, and Qualcomm's shares were up 1.8%. Judge Maryellen Noreika, who presided over the case in U.S. federal court in Delaware, encouraged Arm and Qualcomm to mediate their dispute.