[media] rc-core: fix various sparse warnings

Fix various sparse warnings under drivers/media/rc/*.c, mostly
by making functions static.

Signed-off-by: David Härdeman <david@hardeman.nu>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/rc/ite-cir.c

@@ -1709,12 +1709,12 @@ static struct pnp_driver ite_driver = {
 	.shutdown	= ite_shutdown,
 };
 
-static int ite_init(void)
+static int __init ite_init(void)
 {
 	return pnp_register_driver(&ite_driver);
 }
 
-static void ite_exit(void)
+static void __exit ite_exit(void)
 {
 	pnp_unregister_driver(&ite_driver);
 }