[llvm] [AMDGPU][NFC] Enable gfx942 for more tests (PR #154363)

[Matt Arsenault via llvm-commits]

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@@ -1,5 +1,6 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
-; RUN: llc -mtriple=amdgcn -mcpu=gfx900 < %s | FileCheck -enable-var-scope -check-prefix=GCN %s
+; RUN: llc -mtriple=amdgcn -mcpu=gfx900 < %s | FileCheck -enable-var-scope -check-prefixes=GCN,GFX9 %s
+; RUN: llc -mtriple=amdgcn -mcpu=gfx942 < %s | FileCheck -enable-var-scope -check-prefixes=GCN,GFX942 %s
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arsenm wrote:

This one is probably useful 

https://github.com/llvm/llvm-project/pull/154363