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

[Thorsten Schütt via cfe-commits]

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@@ -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
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tschuett wrote:

After this PR the N2 secretly got support for SVE2. v8.1-a+sve2 is a ton of problems.

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