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>

drivers/iio/adc/ad9467.c

@@ -324,7 +324,7 @@ static int ad9467_setup(struct ad9467_state *st, unsigned int chip_id)
 				  AN877_ADC_OUTPUT_MODE_TWOS_COMPLEMENT;
 		return 0;
 	default:
-		return -EINVAL;
+		return -ENODEV;
 	}
 }