commit e0326be0 upstream.

Not setting the raw parameter in the request causes it to be randomly
initialized to a value that might be different from zero or zero. This leads to
values that are randomly either raw or processed, making it very difficult to
make reliable use of the values.
Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Acked-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
[ luis: backported to 3.11:
  - file rename: drivers/iio/adc/twl4030-madc.c -> drivers/mfd/twl4030-madc.c ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>