[llvm] [AArch64] Transition from MCSymbolRefExpr::VariantKind constants (PR #133214)

[Peter Smith via llvm-commits]

https://github.com/smithp35 commented:

At a glance, this looks reasonable to me. I like that the COFF, ELF and Darwin specifiers are now separated.

Apologies not had much time to look in detail. Will try and take a deeper look next week.

https://github.com/llvm/llvm-project/pull/133214