Fix hasCvtFP8VOP1Bug predicate

Author: arsenm

llvm/lib/Target/AMDGPU/GCNSubtarget.h

@@ -1353,7 +1353,7 @@ class GCNSubtarget final : public AMDGPUGenSubtargetInfo,
   bool hasSplitBarriers() const { return getGeneration() >= GFX12; }
 
   // \returns true if FP8/BF8 VOP1 form of conversion to F32 is unreliable.
-  bool hasCvtFP8VOP1Bug() const { return true; }
+  bool hasCvtFP8VOP1Bug() const { return HasCvtFP8Vop1Bug; }
 
   // \returns true if CSUB (a.k.a. SUB_CLAMP on GFX12) atomics support a
   // no-return form.