twl4030_charger: add missing iio dependency
twl4030_charger: add missing iio dependency

This driver fails to link without CONFIG_IIO, since
there are no stubs for the iio_channels functions.

Signed-off-by: Sebastian Reichel <1ea78bda3cb6d36efdb8fc89aad6555e21b4887e@kernel.org>
Acked-by: Marek Belisko <e54ec4e8b56ff7382fb135e028860ad99be4caf9@goldelico.com>
Acked-by: Nikolaus Schaller <f21c634a73790683e5c9fae328bcce65a30b7426@goldelico.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs