i2c: i2c-smbus: fix i2c_handle_smbus_host_notify documentation

The parameter description is from a previous implementation, update
it to describe the actual implementation.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
diff --git a/drivers/i2c/i2c-smbus.c b/drivers/i2c/i2c-smbus.c
index f574995..b0d2679 100644
--- a/drivers/i2c/i2c-smbus.c
+++ b/drivers/i2c/i2c-smbus.c
@@ -302,8 +302,8 @@
  * i2c_handle_smbus_host_notify - Forward a Host Notify event to the correct
  * I2C client.
  * @host_notify: the struct host_notify attached to the relevant adapter
- * @data: the Host Notify data which contains the payload and address of the
- * client
+ * @addr: the I2C address of the notifying device
+ * @data: the payload of the notification
  * Context: can't sleep
  *
  * Helper function to be called from an I2C bus driver's interrupt