V4L/DVB: ir: use a real device instead of a virtual class

Change the ir-sysfs approach to create irrcv0 as a device, instead of
using class_dev. Also, change the way input is registered, in order
to make its parent to be the irrcv device.

Due to this change, now the event device is created under
/sys/class/ir/irrcv class:

/sys/class/irrcv/irrcv0/
|-- current_protocol
|-- device -> ../../../1-3
|-- input9
|   |-- capabilities
|   |   |-- abs
...

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

include/media/ir-core.h

@@ -47,11 +47,9 @@ struct ir_dev_props {
 
 
 struct ir_input_dev {
-	struct input_dev		*dev;		/* Input device*/
+	struct device			dev;		/* device */
 	struct ir_scancode_table	rc_tab;		/* scan/key table */
 	unsigned long			devno;		/* device number */
-	struct attribute_group		attr;		/* IR attributes */
-	struct device			*class_dev;	/* virtual class dev */
 	const struct ir_dev_props	*props;		/* Device properties */
 };
 #define to_ir_input_dev(_attr) container_of(_attr, struct ir_input_dev, attr)