[PATCH 3/8] xor/arm64: Use shared NEON intrinsics implementation from 32-bit ARM

[Christoph Hellwig]

> +extern void __xor_eor3_2(unsigned long bytes, unsigned long * __restrict p1,
> +		const unsigned long * __restrict p2);

Does the alias magic prevent this from being in a header?  If so a comment
would be nice, otherwise moving it to a header would be even better.