[PATCH][GAS] aarch64: Add basic support for armv8.7-a architecture

[Nick Clifton]

Hi Przemyslaw,

> gas/ChangeLog:
> 2020-10-16  Przemyslaw Wirkus  <mailto:przemyslaw.wirkus@arm.com>
> 
> 	* NEWS: Docs update.
> 	* config/tc-aarch64.c (armv8.7-a): New arch.
> 	* doc/c-aarch64.texi (-march=armv8.7-a): Update docs.
> 
> include/ChangeLog:
> 2020-10-16  Przemyslaw Wirkus  <mailto:przemyslaw.wirkus@arm.com>
> 
> 	* opcode/aarch64.h (AARCH64_FEATURE_V8_7): New feature bitmask.
> 	(AARCH64_ARCH_V8_7): New arch feature set.
> 
> opcodes/ChangeLog:
> 2020-10-16  Przemyslaw Wirkus  <mailto:przemyslaw.wirkus@arm.com>
> 
> 	* aarch64-tbl.h (ARMV8_7): New macro.

Approved - please apply.

Cheers
  Nick