hwmon: (nct6775) Fix register address and added missed tolerance for nct6106

Fixed address of third NCT6106_REG_WEIGHT_DUTY_STEP, and
added missed NCT6106_REG_TOLERANCE_H.

Fixes: 6c009501

 ("hwmon: (nct6775) Add support for NCT6102D/6106D")
Signed-off-by: Bjoern Gerhart <gerhart@posteo.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>