V4L/DVB (4711): Radio: No need to return void

The module_exit function has return-type void and
pci_unregister_driver() returns void anyway.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/radio/radio-gemtek-pci.c b/drivers/media/radio/radio-gemtek-pci.c
index cfab57d..eb14106 100644
--- a/drivers/media/radio/radio-gemtek-pci.c
+++ b/drivers/media/radio/radio-gemtek-pci.c
@@ -449,7 +449,7 @@
 
 static void __exit gemtek_pci_cleanup_module( void )
 {
-	return pci_unregister_driver( &gemtek_pci_driver );
+	pci_unregister_driver(&gemtek_pci_driver);
 }
 
 MODULE_AUTHOR( "Vladimir Shebordaev <vshebordaev@mail.ru>" );