[PATCH][GAS] aarch64: Extract Pointer Authentication feature from Armv8.3-A

[Nick Clifton]

Hi Przemyslaw,

> include/ChangeLog:
> 2020-11-05  Przemyslaw Wirkus  <przemyslaw.wirkus@arm.com>
> 
> 	* opcode/aarch64.h (AARCH64_FEATURE_PAC): Add new feature.
> 	(AARCH64_ARCH_V8_3): Add back PAC to Armv8.3-A.
> 
> opcodes/ChangeLog:
> 2020-11-05  Przemyslaw Wirkus  <przemyslaw.wirkus@arm.com>
> 
> 	* aarch64-tbl.h (PAC): Handle for PAC feature.
> 	(PAC_INSN): New PAC instruction.
> 	(struct aarch64_opcode):  Move PAC instructions from V8_3_INSN to
> 	PAC_INSN.

Approved - please apply.

Cheers
   Nick