Rename adc node to not collide with the default adc
node now present in the native posix dts.
Signed-off-by: Benjamin Björnsson <benjamin.bjornsson@gmail.com>
Remove includes of adc dt-bindings header since these are
now already included in the root .dtsi file that adds an
adc node.
Signed-off-by: Benjamin Björnsson <benjamin.bjornsson@gmail.com>