This update Atmel sam afec driver to use pinctrl driver and API. It
updates all boards with new pinctrl groups format. In addition, it
add overlay files to allow run samples/drivers/adc example.
Signed-off-by: Gerson Fernando Budke <nandojve@gmail.com>
Move the devicetree bindings for Analog-to-Digital Converters (ADCs)
from dts/bindings/iio/adc to dts/bindings/adc as Zephyr does not have
an IIO layer.
Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>