[llvm] [AMDGPU] Remove SIWholeQuadMode pass early exit (PR #98450)

[Jay Foad via llvm-commits]

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@@ -1493,9 +1496,10 @@ void SIWholeQuadMode::lowerCopyInstrs() {
                                 *MRI, MI->getOperand(0)));
     MI->setDesc(TII->get(CopyOp));
   }
+  return !LowerToCopyInstrs.empty();
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jayfoad wrote:

Just from visual inspection, should this be `!LowerToMovInstrs.empty() || !LowerToCopyInstrs.empty()`?

https://github.com/llvm/llvm-project/pull/98450