iio: adc: ad9467: return ENODEV vs EINVAL in ad9467_setup()

The proper error code should be ENODEV (vs EINVAL) in case the chip ID
isn't recognized.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20200916082221.72851-1-alexandru.ardelean@analog.com


Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>