* dlltool.c (interwork): Remove.
        (arm_interwork_jtab): Use bx insn.
        (thumb_jtab): Likewise.
        (MARM_INTERWORK): New machine type.
        (rvaafter): Handle it.
        (rvabefore) Likewise.
        (asm_prefix): Likewise.
        (gen_exp_type): Check machine type instead of
        interwork flag.
        (make_one_lib_file): Likewise.
        (make_head): Likewise.
        (make_tail): Likewise.
        (usage): Update machine types.
        (main): Remove -interwork support.