[PATCH 3/8][Binutils][AArch64] Refactor err_type.

[Nick Clifton]

Hi Tamar,

> include/
> 2018-09-24  Tamar Christina  <tamar.christina@arm.com>
> 
> 	* opcode/aarch64.h (enum err_type): New.
> 	(aarch64_decode_insn): Use it.
> 
> opcodes/
> 2018-09-24  Tamar Christina  <tamar.christina@arm.com>
> 
> 	* aarch64-dis.c (ERR_OK, ERR_UND, ERR_UNP, ERR_NYI): Remove.
> 	(aarch64_decode_insn, print_insn_aarch64_word): Use err_type.

Approved - please apply.

Cheers
  Nick