[ARM][binutils] Rework CPU feature selection in the disassembler

[Nicholas Clifton]

Hi Matthew,

> These macro
> redefinitions make the code difficult to understand. This patch reworks
> the code
> to be more transparent.

Nice.

> include/opcode/
> 2015-05-21  Matthew Wahab  <matthew.wahab@arm.com>
>
>      * arm.h (ARM_FEATURE_ALL): New.
>
> opcodes/
> 2015-05-21  Matthew Wahab  <matthew.wahab@arm.com>
>
>      * arm-dis.c (select_arm_features): Rework to avoid used of
>      redefined macros.

Approved - please apply.

Cheers
   Nick