[PATCH][AArch64] Add ARMv8.3 pointer authentication key registers

[Nick Clifton]

Hi Szabolcs,

> opcodes/
> 2016-11-08  Szabolcs Nagy  <szabolcs.nagy@arm.com>
> 
> 	* aarch64-opc.c (aarch64_sys_regs): Add apiakeylo_el1, apiakeyhi_el1,
> 	apibkeylo_el1, apibkeyhi_el1, apdakeylo_el1, apdakeyhi_el1,
> 	apdbkeylo_el1, apdbkeyhi_el1, apgakeylo_el1 and apgakeyhi_el1.
> 	(aarch64_sys_reg_supported_p): Add feature test for new registers.
> 
> gas/testsuite/
> 2016-11-08  Szabolcs Nagy  <szabolcs.nagy@arm.com>
> 
> 	* gas/aarch64/sysreg-3.s: New.
> 	* gas/aarch64/sysreg-3.d: New.
> 	* gas/aarch64/illegal-sysreg-3.l: New.
> 	* gas/aarch64/illegal-sysreg-3.d: New.

Approved - please apply.

Cheers
  Nick