iio: adc: ina2xx: Make use of the helper macro kthread_run()

Repalce kthread_create/wake_up_process() with kthread_run()
to simplify the code.
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
Link: https://lore.kernel.org/r/20211021124254.3247-1-caihuoqing@baidu.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/adc/ina2xx-adc.c

@@ -842,15 +842,14 @@ static int ina2xx_buffer_enable(struct iio_dev *indio_dev)
 	dev_dbg(&indio_dev->dev, "Async readout mode: %d\n",
 		chip->allow_async_readout);
 
-	task = kthread_create(ina2xx_capture_thread, (void *)indio_dev,
-			      "%s:%d-%uus", indio_dev->name,
-			      iio_device_id(indio_dev),
-			      sampling_us);
+	task = kthread_run(ina2xx_capture_thread, (void *)indio_dev,
+			   "%s:%d-%uus", indio_dev->name,
+			   iio_device_id(indio_dev),
+			   sampling_us);
 	if (IS_ERR(task))
 		return PTR_ERR(task);
 
 	get_task_struct(task);
-	wake_up_process(task);
 	chip->task = task;
 
 	return 0;