iio: adc: ad778-1: do not explicity set INDIO_BUFFER_TRIGGERED mode

The core sets INDIO_BUFFER_TRIGGERED as part of
devm_iio_triggered_buffer_setup().

Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Link: https://lore.kernel.org/r/20220629203847.4801-1-marcus.folkesson@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/adc/ad7768-1.c

@@ -620,7 +620,7 @@ static int ad7768_probe(struct spi_device *spi)
 	indio_dev->num_channels = ARRAY_SIZE(ad7768_channels);
 	indio_dev->name = spi_get_device_id(spi)->name;
 	indio_dev->info = &ad7768_info;
-	indio_dev->modes = INDIO_DIRECT_MODE | INDIO_BUFFER_TRIGGERED;
+	indio_dev->modes = INDIO_DIRECT_MODE;
 
 	ret = ad7768_setup(st);
 	if (ret < 0) {