i2c: add identifier in declarations for i2c_bus_recovery

No reason to have them undefined, so let's add them.
Tested-by: NPhil Reid <preid@electromag.com.au>
Signed-off-by: NWolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

include/linux/i2c.h

@@ -559,14 +559,14 @@ struct i2c_timings {
  * @sda_gpiod: gpiod of the SDA line. Only required for GPIO recovery.
  */
 struct i2c_bus_recovery_info {
-	int (*recover_bus)(struct i2c_adapter *);
+	int (*recover_bus)(struct i2c_adapter *adap);
 
-	int (*get_scl)(struct i2c_adapter *);
-	void (*set_scl)(struct i2c_adapter *, int val);
-	int (*get_sda)(struct i2c_adapter *);
+	int (*get_scl)(struct i2c_adapter *adap);
+	void (*set_scl)(struct i2c_adapter *adap, int val);
+	int (*get_sda)(struct i2c_adapter *adap);
 
-	void (*prepare_recovery)(struct i2c_adapter *);
-	void (*unprepare_recovery)(struct i2c_adapter *);
+	void (*prepare_recovery)(struct i2c_adapter *adap);
+	void (*unprepare_recovery)(struct i2c_adapter *adap);
 
 	/* gpio recovery */
 	struct gpio_desc *scl_gpiod;