[llvm] AMDGPU: Handle gfx950XDL Write VGPR wait state change (PR #126132)

[Matt Arsenault via llvm-commits]

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@@ -2290,12 +2290,14 @@ GFX940_SMFMA_N_PassWritesVGPROverlappedSrcABWaitStates(int NumPasses) {
   return NumPasses + 2;
 }
 
-static int GFX940_XDL_N_PassWritesVGPROverlappedSrcABWaitStates(int NumPasses) {
-  // 2 pass -> 5
-  // 4 pass -> 7
-  // 8 pass -> 11
-  // 16 pass -> 19
-  return NumPasses + 3;
+static int GFX940_XDL_N_PassWritesVGPROverlappedSrcABWaitStates(int NumPasses,
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arsenm wrote:

Can you adjust the title and description of this one 

https://github.com/llvm/llvm-project/pull/126132