[AMDGPU] Fix condition in VOP3_Real_Base. NFCI. (#91373)

Author: rampitec

llvm/lib/Target/AMDGPU/VOPInstructions.td

@@ -1410,7 +1410,7 @@ multiclass VOP3_Real_Base<GFXGen Gen, bits<10> op, string opName = NAME,
       def _e64#Gen.Suffix :
         VOP3_Real_Gen<ps, Gen>,
         VOP3FP8OpSel_dst_bytesel_gfx11_gfx12<op, ps.Pfl>;
-    } if ps.Pfl.HasOpSel then {
+    } else if ps.Pfl.HasOpSel then {
       def _e64#Gen.Suffix :
         VOP3_Real_Gen<ps, Gen>,
         VOP3OpSel_gfx11_gfx12<op, ps.Pfl>;