Documentation: dt: iio: move arm/atmel-adc.txt to iio/adc/at91_adc.txt

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

diff --git a/Documentation/devicetree/bindings/arm/atmel-adc.txt b/Documentation/devicetree/bindings/iio/adc/at91_adc.txt
similarity index 100%
rename from Documentation/devicetree/bindings/arm/atmel-adc.txt
rename to Documentation/devicetree/bindings/iio/adc/at91_adc.txt