gpio: Convert drivers to use module_pci_driver()

This patch converts the drivers in drivers/gpio/* to use
module_pci_driver() macro which makes the code smaller and a bit
simpler by having less boilerplate.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

drivers/gpio/gpio-sodaville.c

@@ -285,17 +285,7 @@ static struct pci_driver sdv_gpio_driver = {
 	.remove = sdv_gpio_remove,
 };
 
-static int __init sdv_gpio_init(void)
-{
-	return pci_register_driver(&sdv_gpio_driver);
-}
-module_init(sdv_gpio_init);
-
-static void __exit sdv_gpio_exit(void)
-{
-	pci_unregister_driver(&sdv_gpio_driver);
-}
-module_exit(sdv_gpio_exit);
+module_pci_driver(sdv_gpio_driver);
 
 MODULE_AUTHOR("Hans J. Koch <hjk@linutronix.de>");
 MODULE_DESCRIPTION("GPIO interface for Intel Sodaville SoCs");