Fix riscv breakage

[Palmer Dabbelt]

On Sat, 31 Dec 2016 02:39:05 PST (-0800), amodra@gmail.com wrote:
> 	* disassemble.c (disassembler): Add break accidentally removed
> 	by PRU patch.
>
> diff --git a/opcodes/disassemble.c b/opcodes/disassemble.c
> index aeed703..fd24857 100644
> --- a/opcodes/disassemble.c
> +++ b/opcodes/disassemble.c
> @@ -384,6 +384,7 @@ disassembler (bfd *abfd)
>  #ifdef ARCH_riscv
>      case bfd_arch_riscv:
>        disassemble = print_insn_riscv;
> +      break;
>  #endif
>  #ifdef ARCH_rs6000
>      case bfd_arch_rs6000:

Thanks!