[PATCH][GAS] aarch64: Add WFIT instruction for Armv8.7-a

[Przemyslaw Wirkus]

Przemyslaw,
> 
> > gas/ChangeLog:
> > 2020-10-30  Przemyslaw Wirkus  <przemyslaw.wirkus@arm.com>
> >
> > 	* NEWS: Update docs.
> > 	* testsuite/gas/aarch64/system-5.d: Update test with WFIT insn.
> > 	* testsuite/gas/aarch64/system-5.s: Update test with WFIT insn.
> >
> > opcodes/ChangeLog:
> > 2020-10-30  Przemyslaw Wirkus  <przemyslaw.wirkus@arm.com>
> >
> > 	* aarch64-tbl.h (struct aarch64_opcode): New instruction WFIT.
> > 	* aarch64-asm-2.c: Regenerated.
> > 	* aarch64-dis-2.c: Regenerated.
> > 	* aarch64-opc-2.c: Regenerated.
> 
> Approved - please apply.

commit a984d94aab7279416021ad320af22093f3e26d48

> Cheers
>   Nick
>