sensor: si7006: fixed temperature conversion

The driver was incorrectly converting the temperature samples. According
to Si7006-A20 rev. 1.2 datasheet, section 5.1.2. Measuring Temperature,
the offset -46.85 must be applied.

Signed-off-by: Max Payne <forgge@gmail.com>
Signed-off-by: Anthony Brandon <anthony@amarulasolutions.com>
1 file changed