[llvm] [AMDGPU][FixIrreducible][UnifyLoopExits] Support callbr with inline-asm (PR #149308)

[Sameer Sahasrabuddhe via llvm-commits]

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@@ -12,7 +12,11 @@
 //
 // Limitation: This assumes that all terminators in the CFG are direct branches
 //             (the "br" instruction). The presence of any other control flow
-//             such as indirectbr, switch or callbr will cause an assert.
+//             such as indirectbr ot switch will cause an assert.
----------------
ssahasra wrote:

```suggestion
//             such as indirectbr or switch will cause an assert.
```

https://github.com/llvm/llvm-project/pull/149308