HID: intel-ish-hid: 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>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/intel-ish-hid/ipc/pci-ish.c

@@ -311,18 +311,7 @@ static struct pci_driver ish_driver = {
 	.driver.pm = ISHTP_ISH_PM_OPS,
 };
 
-static int __init ish_driver_init(void)
-{
-	return pci_register_driver(&ish_driver);
-}
-
-static void __exit ish_driver_exit(void)
-{
-	pci_unregister_driver(&ish_driver);
-}
-
-module_init(ish_driver_init);
-module_exit(ish_driver_exit);
+module_pci_driver(ish_driver);
 
 /* Original author */
 MODULE_AUTHOR("Daniel Drubin <daniel.drubin@intel.com>");