iio: adc: ad7606_spi: use bitmap_full() in ad7606_spi_update_scan_mode()
bitmap_full() is less verbose and more efficient, as it stops traversing
scan_mask as soon as the 1st unset bit found.
Signed-off-by: Yury Norov (NVIDIA) <yury.norov@gmail.com>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
authored by