leds: max8997: use mode when calling max8997_led_set_mode

Variable mode is assigned to pdata->led_pdata->mode[led->id] and yet
is not being used when calling function max8997_led_set_mode. Fix
this by using mode when calling max8997_led_set_mode.

Cleans up clang warning:
warning: variable 'mode' set but not used [-Wunused-but-set-variable]

Fixes: 8584cb82f151 ("leds: Add suuport for MAX8997-LED driver")
Signed-off-by: Colin Ian King <[e-mail]>
Signed-off-by: Jacek Anaszewski <[e-mail]>

drivers/leds/leds-max8997.c

···
 		mode = pdata->led_pdata->mode[led->id];
 		brightness = pdata->led_pdata->brightness[led->id];
 
-		max8997_led_set_mode(led, pdata->led_pdata->mode[led->id]);
+		max8997_led_set_mode(led, mode);
 
 		if (brightness > led->cdev.max_brightness)
 			brightness = led->cdev.max_brightness;