The twl4030_charger driver expects an iio channel to detect the
presence of an AC charger by looking at VAC (madc channel 11).
This definition is missing in the device tree.
Signed-off-by: Marek Belisko <marek@goldelico.com> Signed-off-by: Sebastian Reichel <sre@kernel.org> Signed-off-by: Tony Lindgren <tony@atomide.com>