[clang] [llvm] [AVR] Add many new AVR MCU model definitions (PR #144229)

[Kazu Hirata via llvm-commits]

kazutakahirata wrote:

@tomtor https://github.com/llvm/llvm-project/actions/runs/15653757180/job/44101995731?pr=144229

is showing:

```
/home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/Misc/target-invalid-cpu-note/avr.c:314:16: error: CHECK-SAME: expected string not found in input
// CHECK-SAME: {{^}}, atmega808
               ^
```

I also see the same thing with `check-clang`.  Is this related to your PR?



https://github.com/llvm/llvm-project/pull/144229