[OPCODES][ARM][1/3]Add armv8.2 fp16 instruction dissembler support.

[Nick Clifton]

Hi Renlin,

> opcodes/ChangeLog:
> 
> 2016-02-19  Renlin Li  <renlin.li@arm.com>
> 
>          * arm-dis.c (coprocessor_opcodes): Add fp16 instruction entries.
>      (print_insn_coprocessor): Support fp16 instruction.
> 
> gas/ChangeLog:
> 2016-02-19  Renlin Li  <renlin.li@arm.com>
> 
>          * testsuite/gas/arm/copro.d: Adjust output.
>          * testsuite/gas/arm/copro.s: Adjust co-processor num.

Approved - please apply.

Cheers
  Nick