hwmon: (ntc_thermistor) Convert to devm_kzalloc

This avoids memory leaks, and makes the code a bit simpler and smaller.

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Reviewed-by: Robert Coulson <robert.coulson@ericsson.com>

diff --cc drivers/hwmon/ntc_thermistor.c
Simple merge