thermal: rockchip: update the tsadc table for rk3399

This patch fixes the incorrect conversion table.
The Code to Temperature mapping is updated based on sillcon results.

Fixes commit b0d70338
("thermal: rockchip: Support the RK3399 SoCs in thermal driver").

Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>