Fix bug in which all non-chain luts are considered length-1 chains.#2363

KA7E wants to merge 4 commits intomasterverilog-to-routing/vtr-verilog-to-routing:masterfrom

avoid_trivial_carry_chainsverilog-to-routing/vtr-verilog-to-routing:avoid_trivial_carry_chainsCopy head branch name to clipboard