[media] rc-core: simplify sysfs code

Simplify and cleanup the sysfs code a bit.

[m.chehab@samsung.com: rebased and fixed a CodingStyle issue]
Signed-off-by: David Härdeman <david@hardeman.nu>

Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/rc/ir-raw.c

@@ -240,6 +240,12 @@ ir_raw_get_allowed_protocols(void)
 	return protocols;
 }
 
+static int change_protocol(struct rc_dev *dev, u64 *rc_type)
+{
+	/* the caller will update dev->enabled_protocols */
+	return 0;
+}
+
 /*
  * Used to (un)register raw event clients
  */
@@ -257,6 +263,7 @@ int ir_raw_event_register(struct rc_dev *dev)
 
 	dev->raw->dev = dev;
 	rc_set_enabled_protocols(dev, ~0);
+	dev->change_protocol = change_protocol;
 	rc = kfifo_alloc(&dev->raw->kfifo,
 			 sizeof(struct ir_raw_event) * MAX_IR_EVENT_SIZE,
 			 GFP_KERNEL);