arm64: split ARM64_PTR_AUTH option to userspace and kernel

[Will Deacon]

On Fri, Dec 18, 2020 at 12:56:30PM +0100, Daniel Kiss wrote:
> As discussed the A-key left enabled, this makes the patch simpler too.
> arch/arm64/crypto/poly1305-core.S_shipped contains PACISP/AUTISP
> instructions but this code is called while the preeption is disabled,
> therefore it won't cause any trouble.

Please use the --cover-letter option to git format-patch for generating your
cover letter. It's also best to send new versions out as a new series,
rather than replying to the previous one.

Thanks,

Will