[XPU] fix fc_xpu_fuse_pass (#50569)

paddle/fluid/framework/ir/xpu/fc_xpu_fuse_pass.cc

@@ -310,6 +310,8 @@ void FcXPUFusePass::ApplyImpl(ir::Graph* graph,
       delete_nodes = {mul, mul_out, act};
     } else if (add) {
       delete_nodes = {mul, mul_out, add};
+    } else {
+      delete_nodes = {mul};
     }
     GraphSafeRemoveNodes(graph, delete_nodes);
     found_subgraph_count++;

paddle/fluid/framework/ir/xpu/quant_utils.cc

@@ -160,8 +160,16 @@ void QuantWeight(phi::DenseTensor* weight,
     weight->Resize(weight_trans.dims());
   }
   // Find max
-  auto* xpu_ctx = static_cast<phi::XPUContext*>(
-      platform::DeviceContextPool::Instance().Get(phi::XPUPlace()));
+  paddle::platform::DeviceContextPool& pool =
+      paddle::platform::DeviceContextPool::Instance();
+  const auto& dev_ctxs = pool.device_contexts();
+  auto place = phi::XPUPlace();  // xpu:0
+  for (auto it = dev_ctxs.begin(); it != dev_ctxs.end(); it++) {
+    if (it->first.GetType() == phi::AllocationType::XPU) {  // maybe xpu:1
+      place = it->first;
+    }
+  }
+  phi::XPUContext* xpu_ctx = static_cast<phi::XPUContext*>(pool.Get(place));
   int max_ptr_size = xpu_ctx->x_context()->max_ptr_size();
   int size = weight->numel();
   float max_val = FindMaxAbs(weight_data, size);