[PATCH] arm64: Delete the zero_za macro

[Mark Brown]

On Wed, Dec 06, 2023 at 12:01:40AM +0800, Zenghui Yu wrote:
> zero_za was introduced in commit ca8a4ebcff44 ("arm64/sme: Manually encode
> SME instructions") but doesn't appear to have any in kernel user. Drop it.
> 
> Signed-off-by: Zenghui Yu <yuzenghui at huawei.com>

You're right that this isn't used, though OTOH it's not exactly doing
any harm either and as a macro doesn't inflate the image or anything.

Acked-by: Mark Brown <broonie at kernel.org>
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