thermal: rcar_gen3_thermal: Update calculation formula due to HW evaluation

Due to hardware evaluation result,
Max temperature is changed from 96 to 116 degree Celsius.
Also, calculation formula and pseudo FUSE values are changed accordingly.

Signed-off-by: Dien Pham <dien.pham.ry@renesas.com>
Signed-off-by: Hien Dang <hien.dang.eb@renesas.com>
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>