leds: leds-lm3697: Provide some missing descriptions for struct members

Fixes the following W=1 kernel build warning(s):

 drivers/leds/leds-lm3697.c:60: warning: Function parameter or member 'enabled' not described in 'lm3697_led'
 drivers/leds/leds-lm3697.c:60: warning: Function parameter or member 'num_leds' not described in 'lm3697_led'
 drivers/leds/leds-lm3697.c:84: warning: Function parameter or member 'bank_cfg' not described in 'lm3697'
 drivers/leds/leds-lm3697.c:84: warning: Function parameter or member 'num_banks' not described in 'lm3697'

Cc: Pavel Machek <pavel@ucw.cz>
Cc: Dan Murphy <dmurphy@ti.com>
Cc: linux-leds@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Pavel Machek <pavel@ucw.cz>

drivers/leds/leds-lm3697.c

@@ -47,6 +47,8 @@
  * @lmu_data: Register and setting values for common code
  * @control_bank: Control bank the LED is associated to. 0 is control bank A
  *		   1 is control bank B
+ * @enabled: LED brightness level (or LED_OFF)
+ * @num_leds: Number of LEDs available
  */
 struct lm3697_led {
 	u32 hvled_strings[LM3697_MAX_LED_STRINGS];
@@ -68,6 +70,8 @@ struct lm3697_led {
  * @dev: Pointer to the devices device struct
  * @lock: Lock for reading/writing the device
  * @leds: Array of LED strings
+ * @bank_cfg: OUTPUT_CONFIG register values
+ * @num_banks: Number of control banks
  */
 struct lm3697 {
 	struct gpio_desc *enable_gpio;