qla3xxx: 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.

dpatch engine is used to auto generate this patch.
(https://github.com/weiyj/dpatch)

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: Jitendra Kalsaria <jitendra.kalsaria@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/qlogic/qla3xxx.c

@@ -3953,15 +3953,4 @@ static struct pci_driver ql3xxx_driver = {
 	.remove = __devexit_p(ql3xxx_remove),
 };
 
-static int __init ql3xxx_init_module(void)
-{
-	return pci_register_driver(&ql3xxx_driver);
-}
-
-static void __exit ql3xxx_exit(void)
-{
-	pci_unregister_driver(&ql3xxx_driver);
-}
-
-module_init(ql3xxx_init_module);
-module_exit(ql3xxx_exit);
+module_pci_driver(ql3xxx_driver);