[clang] [llvm] [aarch64][clang][llvm] Allow AArch64 TLB maintenance instructions to be enabled via -march (PR #116707)

[Eli Friedman via cfe-commits]

efriedma-quic wrote:

In assembly, you can override the current architecture with a `.arch` directive.

https://github.com/llvm/llvm-project/pull/116707