[llvm] [AMDGPU] Remove scope check in SIInsertWaitcnts::generateWaitcntInstBefore (PR #157821)

[Matt Arsenault via llvm-commits]

================
@@ -0,0 +1,65 @@
+; RUN: llc -mtriple=amdgcn--amdhsa -mcpu=gfx950 < %s | FileCheck -check-prefix=CHECK %s
+
+declare void @llvm.amdgcn.sched.barrier(i32 %mask) #0
+declare void @llvm.amdgcn.load.to.lds(ptr %in, ptr addrspace(3) %lds_out, i32 %size, i32 %offset, i32 %aux) #0
+
+define amdgpu_kernel void @test_waitcnt(ptr addrspace(1) %global_buffer, ptr addrspace(3) %lds_buffer1, ptr addrspace(3) %lds_buffer2) {
----------------
arsenm wrote:

```suggestion
define amdgpu_kernel void @test_waitcnt(ptr addrspace(1) %global_buffer, ptr addrspace(3) %lds_buffer1, ptr addrspace(3) %lds_buffer2) #0 {
```

https://github.com/llvm/llvm-project/pull/157821