[llvm] [AMDGPU] SIPeepholeSDWA: Handle V_CNDMASK_B32_e64 (PR #137930)

[Matt Arsenault via llvm-commits]

================
@@ -0,0 +1,41 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 5
+# RUN: llc -mtriple=amdgcn-amd-amdhsa -run-pass=si-peephole-sdwa -mcpu=gfx803 -o - %s | FileCheck  -check-prefix=gfx8 %s
----------------
arsenm wrote:

check prefixes should be all caps 

https://github.com/llvm/llvm-project/pull/137930