[llvm] [AArch64] Add Ampere1B scheduling/pipeline model (PR #81338)

[Nico Weber via llvm-commits]

nico wrote:

> > http://45.33.8.238/linux/130453/step_4.txt
> > Did you try compiling before committing?
> 
> Ninja didn't pick up the change of the .td file. I have the fix (a missing ',') ready, but am rerunning a clean rebuild.

How can that happen? Does tblgen not write depfiles for included .td files?

https://github.com/llvm/llvm-project/pull/81338