[llvm] [AArch64] Enable AvoidLDAPUR for cpu=generic between armv9.0 and armv9.3. (PR #125261)

[David Green via llvm-commits]

davemgreen wrote:

I talked to some people internally and they mentioned that some of the the graviton machines are armv8.4, and users could use that to compile for multiple cpu generations. I was hoping to limit the blast radius of this in the long run, but whatever we do will be a bit rubbish and adding 8.4 might be the least bad option.

https://github.com/llvm/llvm-project/pull/125261