iio: ad9517: Allow to force 3-wire SPI with adi,spi-3wire-enable

Signed-off-by: Paul Cercueil <paul.cercueil@analog.com>
iio: ad9517: Fix overflow in calculation of VCO frequency

Signed-off-by: Paul Cercueil <paul.cercueil@analog.com>
iio: ad9467: Fix DCO calibration of channel 0

Signed-off-by: Paul Cercueil <paul.cercueil@analog.com>
iio: ad9467: Add support for the AD9652

Signed-off-by: Paul Cercueil <paul.cercueil@analog.com>
firmware: Add firmware for the AD9517 used in the FMCOMMS-6

Signed-off-by: Paul Cercueil <paul.cercueil@analog.com>
devicetree: Added zynq-zc706-adv7511-fmcomms6.dts

Signed-off-by: Paul Cercueil <paul.cercueil@analog.com>