[PATCH][GAS][ARM] Implement yield, wfe, wfi and sev assembly instructions for ARMv6T2.

[Nick Clifton]

Hi Srinath,

> gas/ChangeLog:
> 
> 2019-01-10  Srinath Parvathaneni <srinath.parvathaneni@arm.com>
> 
> * config/tc-arm.c (arm_ext_v6k_v6t2): Define.
> (insns) [ARM_VARIANT]: Modified.
> (insns) [THUMB_VARIANT]: To implement few ARMv6K instructions
> in ARMv6T2 as well.
> * testsuite/gas/arm/archv6t2-1.d: New test.
> * testsuite/gas/arm/archv6t2-1.s: Likewise.
> * testsuite/gas/arm/archv6t2-2.d: Likewise.

Approved and applied.

Cheers
  Nick