[media] ir-kbd-i2c: add rc_dev as a parameter to the driver

There are several fields on rc_dev that drivers can benefit. Allow drivers
to pass it as a parameter to the driver.

For now, the rc_dev parameter is optional. If drivers don't pass it, create
them internally. However, the best is to create rc_dev inside the drivers,
in order to fill other fields, like open(), close(), driver_name, etc.
So, a latter patch making it mandatory and changing the caller drivers is
welcome.

Signed-off-by: Mauro Carvalho Chehab <[email protected]>

include/media/ir-kbd-i2c.h

@@ -46,5 +46,7 @@ struct IR_i2c_init_data {
 	 */
 	int                    (*get_key)(struct IR_i2c*, u32*, u32*);
 	enum ir_kbd_get_key_fn internal_get_key_func;
+
+	struct rc_dev		*rc_dev;
 };
 #endif