Fix segfault when unloading tlkm

(cherry picked from commit e23a9ad7af796de71adcdd37c89a2ec5e539e7a1)

tlkm/pcie/pcie_device.c

@@ -69,6 +69,8 @@ error_pci_en:
 
 static void release_device(struct tlkm_pcie_device *pdev)
 {
+	struct pci_dev *dev = pdev->pdev;
+	dev_set_drvdata(&dev->dev, NULL);
 	pci_release_regions(pdev->pdev);
 	pci_disable_device(pdev->pdev);
 }