Add hardware_pause() for other platforms

[benstadin]

In reference to the todo mentioned here:

xenium/xenium/detail/hardware.hpp

Line 19 in ea3b4fa

// TODO - add pause implementations for ARM + Power

Atomic_queue has several definitions for other platforms. I verified these to work on various ARM 32/64 platforms (Raspberry PI 32 and 64, Apple Silicon):
https://github.com/max0x7ba/atomic_queue/blob/master/include/atomic_queue/defs.h