iio: adc: ad9467: use devm facility

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
microblaze: update ADI config and dt support.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
iio: adc: cf_axi_adc: fix DCO calibration and add IIO_CHAN_INFO_SAMP_FREQ

Add IIO_CHAN_INFO_SAMP_FREQ
Fix DCO delay scan by also scanning the inverted clock
Unify DCO calibration for 1c and 2c

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>