[PATCH] aarch64: Revert "aarch64: Optimized implementation of strnlen" [BZ #25825]

[Florian Weimer]

* zhuyan:

> After commit 2911cb68ed3d6c515ad1979237e74e1fefab3674("aarch64:
> Optimized implementation of strnlen"), there is a problem when calling the strnlen interface to handle the string length of 9 or more
>
> This reverts commit 2911cb68ed3d6c515ad1979237e74e1fefab3674.

Do you have a test case for this bug?  Or is it already caught by the
test suite?

Thanks,
Florian