[llvm] [clang] [AArch64] Correctly mark Neoverse N2 as an Armv9.0a core (PR #75055)

[Jonathan Thackray via cfe-commits]

================
@@ -94,6 +94,11 @@ Changes to the AArch64 Backend
 
 * Added support for Cortex-A520, Cortex-A720 and Cortex-X4 CPUs.
 
+* Neoverse-N2 was incorrectly marked as an Armv8.5a core. This has been
+  changed to an Armv9.0a core. However, crypto options are not enabled
+  by default for Armv9 cores, so `-mcpu=neoverse-n2+crypto` is required
----------------
jthackray wrote:

Thanks for your comments. I've adjusted the wording in another commit to:

```
 * Neoverse-N2 was incorrectly marked as an Armv8.5a core. This has been
   changed to an Armv9.0a core. However, crypto options are not enabled
   by default for Armv9 cores, so `-mcpu=neoverse-n2+crypto` is now required
   to enable crypto for this core. As far as the compiler is concerned,
   Armv9.0a has the same features enabled as Armv8.5a, with the exception
   of crypto.
```

https://github.com/llvm/llvm-project/pull/75055