Refactor uarch and ISA detection on iOS

pytorch / cpuinfo

CPU INFOrmation library (x86/x86-64/ARM/ARM64, Linux/Windows/Android/macOS/iOS)

BSD 2-Clause "Simplified" License

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Closed Maratyszcza closed 2 years ago

Maratyszcza commented 2 years ago

Nuke support for 32-bit iOS (was already broken anyway)
Detect Avalanche & Blizzard cores
Add more fallbacks for detection based on CPU Family for older iOS / macOS versions and core types

cc @kulinseth