[clang] [Clang][ARM] Ensure FPU Features are parsed when targeting `cc1as` (PR #134612)

[David Green via cfe-commits]

================
@@ -38,6 +38,9 @@ Potentially Breaking Changes
 - Fix missing diagnostics for uses of declarations when performing typename access,
   such as when performing member access on a '[[deprecated]]' type alias.
   (#GH58547)
+- For ARM targets, when using cc1as, the features included in the selected CPU or
+  Architecture's FPU are now loaded and utilized. If you wish not to use a specific feature,
+  the relevant ``+no`` option will need to be amended to the command line option.
----------------
davemgreen wrote:

Maybe:
- For ARM targets when compiling assembly files, the features included in the in the selected CPU or Architecture's FPU are included, in the same way they are for a C compile. If you..

https://github.com/llvm/llvm-project/pull/134612