enic: use module_pci_driver to simplify the code

Use the module_pci_driver() macro to make the code simpler
by eliminating module_init and module_exit calls.
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/cisco/enic/enic_main.c

@@ -3040,15 +3040,4 @@ static struct pci_driver enic_driver = {
 	.remove = enic_remove,
 };
 
-static int __init enic_init_module(void)
-{
-	return pci_register_driver(&enic_driver);
-}
-
-static void __exit enic_cleanup_module(void)
-{
-	pci_unregister_driver(&enic_driver);
-}
-
-module_init(enic_init_module);
-module_exit(enic_cleanup_module);
+module_pci_driver(enic_driver);