axi-adc and axi-ad485x backend variants provide calibration support,
whereas the axi-ad408x does not. Set accordingly.

Signed-off-by: Tomas Melin <tomas.melin@vaisala.com>
---
 drivers/iio/adc/adi-axi-adc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c
index 14fa4238c2b96b1ac722d537bc49ed4ca8e36925..968e35b0a29e0da3b4cfb8a33944b9c23e3cdb4e 100644
--- a/drivers/iio/adc/adi-axi-adc.c
+++ b/drivers/iio/adc/adi-axi-adc.c
@@ -626,6 +626,7 @@ static const struct iio_backend_ops adi_axi_adc_ops = {
 static const struct iio_backend_info adi_axi_adc_generic = {
 	.name = "axi-adc",
 	.ops = &adi_axi_adc_ops,
+	.caps = IIO_BACKEND_CAP_CALIBRATION,
 };
 
 static const struct iio_backend_ops adi_ad485x_ops = {
@@ -650,6 +651,7 @@ static const struct iio_backend_ops adi_ad485x_ops = {
 static const struct iio_backend_info axi_ad485x = {
 	.name = "axi-ad485x",
 	.ops = &adi_ad485x_ops,
+	.caps = IIO_BACKEND_CAP_CALIBRATION,
 };
 
 static const struct iio_backend_ops adi_ad408x_ops = {

-- 
2.47.3