platform/x86: thinkpad_acpi: Stop setting led_classdev brightness directly

There is no need to set the led_classdev's brightness value from
its set_brightness callback, this is taken care of by the led-core and
thinkpad_acpi really should not be mucking with it.

Note that kbdlight_set_level_and_update() is still used by the old
thinpad_acpi specific sysfs interface for the led, so we cannot
remove it.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Pavel Machek <pavel@ucw.cz>

drivers/platform/x86/thinkpad_acpi.c

@@ -5095,8 +5095,6 @@ static int kbdlight_set_level(int level)
 	return 0;
 }
 
-static int kbdlight_set_level_and_update(int level);
-
 static int kbdlight_get_level(void)
 {
 	int status = 0;
@@ -5164,7 +5162,7 @@ static void kbdlight_set_worker(struct work_struct *work)
 			container_of(work, struct tpacpi_led_classdev, work);
 
 	if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
-		kbdlight_set_level_and_update(data->new_state);
+		kbdlight_set_level(data->new_state);
 }
 
 static void kbdlight_sysfs_set(struct led_classdev *led_cdev,