drivers: Guard dump_stack with DEBUG_KERNEL

Thanks to @tashar02 for pointing out these dump_stacks which were causing logspams

Signed-off-by: Wahid7852 <wahidzk0091@gmail.com>

drivers/leds/led-core.c

@@ -177,7 +177,6 @@ static void led_blink_setup(struct led_classdev *led_cdev,
 void led_init_core(struct led_classdev *led_cdev)
 {
 	INIT_WORK(&led_cdev->set_brightness_work, set_brightness_delayed);
-
 	setup_timer(&led_cdev->blink_timer, led_timer_function,
 		    (unsigned long)led_cdev);
 }

drivers/soc/mediatek/mtk-cmdq-helper.c

@@ -183,7 +183,9 @@ struct cmdq_client *cmdq_mbox_create(struct device *dev, int index)
 	if (IS_ERR(client->chan)) {
 		cmdq_err("channel request fail:%d, idx:%d",
 			PTR_ERR(client->chan), index);
+#ifdef CONFIG_DEBUG_KERNEL
 		dump_stack();
+#endif
 		kfree(client);
 		return NULL;
 	}