as: Add new atomic instructions in LoongArch v1.1 LoongArch V1.1 release is out at https://github.com/loongson/LoongArch-Documentation. New atomic instructions in LoongArch v1.1: - sc.q - llacq.w/d - screl.w/d - amcas{_db}.b/h/w/d - amswap{_db}.b/h - amadd{_db}.b/h Signed-off-by: Jiajie Chen <c@jia.je>