[clang] [llvm] [ARM][AArch32] Add support for AArch32 Cortex-M52 CPU (PR #74822)

[David Spickett via cfe-commits]

DavidSpickett wrote:

> Yes, that's correct. We enable all mandatory and optional architecture extensions, with the exception of crypto.

Cool.

That said then, should CDE be added?
```
Accelerator support	

Optional coprocessor interface (64-bit) supporting up to 8 coprocessor units for custom compute accelerators
Optional [Arm Custom Instructions](https://developer.arm.com/architectures/instruction-sets/custom-instructions)
``` 

https://github.com/llvm/llvm-project/pull/74822