[llvm] [AsmParser][MCA] Fix handling of multi-character comments (PR #147228)

[Fangrui Song via llvm-commits]

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@@ -0,0 +1,10 @@
+	// REQUIRES: aarch64-registered-target
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MaskRay wrote:

excess \t at the line beginning? If this is intentional, add a comment.

If this 

https://github.com/llvm/llvm-project/pull/147228