(LEAD) Efforts to get N. Korea to denuclearize 'probably a lost cause': U.S. intelligence chief

(ATTN: UPDATES in paras 5-7 with State Department saying denuclearization remains U.S. goal)By Chang Jae-soon

WASHINGTON, Oct. 25 (Yonhap) -- Any effort to get North Korea to give up its nuclear program "is probably a lost cause" and putting a cap o