This converts twl4030-madc module to use the Industrial IO ADC
framework and adds device tree support.
Signed-off-by: NSebastian Reichel <sre@debian.org>
Tested-by: NMarek Belisko <marek@goldelico.com>
Acked-by: NJonathan Cameron <jic23@kernel.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>