fix a bug

include/ck/tensor_operation/gpu/device/impl/device_grouped_multihead_attention_backward_xdl_cshuffle_v2.hpp

@@ -136,6 +136,9 @@ __global__ void
     ignore = acc_element_op;
     ignore = b1_element_op;
     ignore = c_element_op;
+    ignore = p_dropout;
+    ignore = seed;
+    ignore = offset;
 #endif // end of if (defined(__gfx908__) || defined(__gfx90a__))
 }
 
@@ -668,12 +671,9 @@ struct DeviceGroupedMultiheadAttentionBackward_Xdl_CShuffle_V2
               b_element_op_{b_element_op},
               acc_element_op_{acc_element_op},
               b1_element_op_{b1_element_op},
-              c_element_op_{c_element_op}
+              c_element_op_{c_element_op},
+              p_dropout_{p_drop}
         {
-            p_dropout_        = 1.f - p_drop;
-            float rp_dropout_ = 1.f / p_dropout_;
-            acc_element_op_.Append(rp_dropout_);
-
             seed_   = std::get<0>(seeds);
             offset_ = std::get<1>(seeds);