[PATCH][Binutils, gas] arm: Add support for new unwinder directive ".pacspval".

[Nick Clifton]

Hi Srinath,

> 2022-11-07  Srinath Parvathaneni  <srinath.parvathaneni@arm.com>
> 
>          * doc/c-arm.texi: Document directive.
>          * config/tc-arm.c (s_arm_unwind_pacspval): Define function.
>          (md_pseudo_table): Add entry for pacspval directive.
>          * testsuite/gas/arm/ehabi-pacbti-m.d: New test.
>          * testsuite/gas/arm/ehabi-pacbti-m.s: Likewise.

Approved - please apply.

Note - for future reference - when one patch depends upon another
it is helpful to mention it.  For example, when I was testing this
patch I did not have your patch to readelf applied, so the new test
failed.  Once I had noticed this and applied the readelf patch,
everything worked OK, but it would have saved me time if I had known
that I needed to apply both patches at the same time.

Cheers
   Nick