[llvm] [GlobalISel][AArch64] Handles bitreverse to prevent falling back (PR #138150)

[Matt Arsenault via llvm-commits]

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@@ -329,3 +373,5 @@ define <2 x i64> @g_vec_2x64(<2 x i64> %a) {
   %b = call <2 x i64> @llvm.bitreverse.v2i64(<2 x i64> %a)
   ret <2 x i64> %b
 }
+
+
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arsenm wrote:

```suggestion
```

Spurious whitespace change 

https://github.com/llvm/llvm-project/pull/138150