Temperature was wrongly represented as 12-bit signed, confirmed by checking
the datasheet. Even if the temperature is negative, the value in the
register stays unsigned.
Fixes: 12ed27863e iio: accel: Add driver support for ADXL355
Signed-off-by: Valek Andrej <andrej.v@skyrain.eu>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>