Revert "twl4030-madc: Return raw values from twl4030_get_madc_conversion"

This reverts commit 12f9fdbbccadde55fb6d8441ac2f9744f16f0372.
twl4030-madc: Request processed values in twl4030_get_madc_conversion

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>
gta04-audio: Jack detection thresholds for processed values

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>