Mark Geragos is sticking to his guns ... telling us Los Angeles County District Attorney Nathan Hochman is full of it when he says the D.A.'s office and the LAPD worked in lockstep to arrest and charge D4vd with Celeste Rivas ' murder. The famed defense attorney joined us on "TMZ Live" Tuesday and called BS on some of Hochman's claims from Monday's news conference, where Hochman refuted what Geragos told us -- that LAPD went rogue in arresting D4vd -- on the "2 Angry Men" podcast. Geragos says