Brian Steinberg Senior TV EditorAMC Networks wants to make it possible for advertisers to buy time in linear broadcasts of “The Walking Dead” or “Better Call Saul” in the same way they do digital commercial inventory.The owner of the AMC and BBC America cable networks said it worked with advertisers including Best Western, Smithfield Foods, Securian Financial and others during the third quarter on technology that let the marketers enable programmatic and addressable buying on TV.