ARM - Aarch64
Hi Ragnaroek,

I've implemented the `sse.rs` and most of the m128d and m128i for aarch64, unfortunately the Raspberry Pi 4B doesn't have the crypto extension.
Therefore I was unable to verify if the AESE instruction works, although it does compile when using RUSTFLAGS='-C target_feature=+aes'.
I was wondering what your preferred way of seperating the different architectures would be.

https://github.com/DaanA32/mithril/tree/aarch64