hw/pci/pcie: Replace PCI_DEVICE() casts with existing variable

A little cleanup is possible because of hotplug_pdev introduction.

Signed-off-by: Julia Suvorova <jusual@redhat.com>
Message-Id: <20200427182440.92433-3-jusual@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>

hw/pci/pcie.c

@@ -449,7 +449,7 @@ void pcie_cap_slot_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev,
             pci_word_test_and_set_mask(exp_cap + PCI_EXP_LNKSTA,
                                        PCI_EXP_LNKSTA_DLLLA);
         }
-        pcie_cap_slot_event(PCI_DEVICE(hotplug_dev),
+        pcie_cap_slot_event(hotplug_pdev,
                             PCI_EXP_HP_EV_PDC | PCI_EXP_HP_EV_ABP);
     }
 }
@@ -490,7 +490,7 @@ void pcie_cap_slot_unplug_request_cb(HotplugHandler *hotplug_dev,
         return;
     }
 
-    pcie_cap_slot_plug_common(PCI_DEVICE(hotplug_dev), dev, &local_err);
+    pcie_cap_slot_plug_common(hotplug_pdev, dev, &local_err);
     if (local_err) {
         error_propagate(errp, local_err);
         return;
@@ -509,7 +509,7 @@ void pcie_cap_slot_unplug_request_cb(HotplugHandler *hotplug_dev,
         return;
     }
 
-    pcie_cap_slot_push_attention_button(PCI_DEVICE(hotplug_dev));
+    pcie_cap_slot_push_attention_button(hotplug_pdev);
 }
 
 /* pci express slot for pci express root/downstream port