[Autobackout][FuncReg]Revert of change: 1f24206

Allow float to packed half-float move on select platforms, second try.

Author: weiyu-chen

visa/HWCaps.inc

@@ -699,9 +699,4 @@
    {
        return false;
    }
-
-   bool hasFtoPackedHFMove() const
-   {
-      return false;
-   }
-   // end HW capabilities
+    // end HW capabilities

visa/HWConformity.cpp

@@ -1674,10 +1674,8 @@ bool HWConformity::fixDstAlignment(INST_LIST_ITER i, G4_BB* bb, G4_Type extype,
             {
                 intHFConversion = true;
             }
-            // F to packed HF operations are handled specially later
-            bool FtoHFMov = dst->getType() == Type_HF && src0->getType() == Type_F;
-            if (builder.getPlatform() >= GENX_CHV && !intHFConversion &&
-                (inst->isMixedMode() || (builder.hasFtoPackedHFMove() && FtoHFMov && inst->getExecSize() >= builder.getNativeExecSize())))
+            // we allow packed destination for F to HF.
+            if (builder.getPlatform() >= GENX_CHV && !intHFConversion && inst->isMixedMode())
             {
                 return insertMOV;
             }