[clang] Add armagicpu to release notes (PR #205599)

[Mark Murray via cfe-commits]

https://github.com/MarkMurrayARM created https://github.com/llvm/llvm-project/pull/205599

Add armagicpu to release notes

Raised by validator.

>From 21b14769550fc0b4b542b86b0fc7c0c4af72c020 Mon Sep 17 00:00:00 2001
From: Mark Murray <Mark.Murray at arm.com>
Date: Wed, 24 Jun 2026 17:50:14 +0100
Subject: [PATCH] [AArch64] Document armagicpu in release notes

---
 clang/docs/ReleaseNotes.rst | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 8bb17755b28f5..1132cc8e07241 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -888,6 +888,8 @@ X86 Support
 Arm and AArch64 Support
 ^^^^^^^^^^^^^^^^^^^^^^^
 
+- Added support for ``-mcpu=armagicpu`` as an alias for ``neoverse-v3ae``.
+
 Android Support
 ^^^^^^^^^^^^^^^