ALSA: pci: clean up using module_pci_driver()

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/ens1370.c b/sound/pci/ens1370.c
index 47a245e..3821c81 100644
--- a/sound/pci/ens1370.c
+++ b/sound/pci/ens1370.c
@@ -2488,7 +2488,7 @@
 	pci_set_drvdata(pci, NULL);
 }
 
-static struct pci_driver driver = {
+static struct pci_driver ens137x_driver = {
 	.name = KBUILD_MODNAME,
 	.id_table = snd_audiopci_ids,
 	.probe = snd_audiopci_probe,
@@ -2499,15 +2499,4 @@
 #endif
 };
 	
-static int __init alsa_card_ens137x_init(void)
-{
-	return pci_register_driver(&driver);
-}
-
-static void __exit alsa_card_ens137x_exit(void)
-{
-	pci_unregister_driver(&driver);
-}
-
-module_init(alsa_card_ens137x_init)
-module_exit(alsa_card_ens137x_exit)
+module_pci_driver(ens137x_driver);