Revert "thermal: rockchip: fix up the tsadc pinctrl setting error"

This reverts commit 28694e00.

The commit causes multiple issues in that:
- the added call to ->control does potentially run unclocked
  causing a hang of the machine
- the added pinctrl-states are undocumented in the binding
- the added pinctrl-states are not backwards compatible, breaking
  old devicetrees.

Fixes: 28694e00

 ("thermal: rockchip: fix up the tsadc pinctrl setting error")
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Reported-by: kernelci.org bot <bot@kernelci.org>
Reported-by: Enric Balletbo Serra <eballetbo@gmail.com>
Reported-by: Vicente Bergas <vicencb@gmail.com>
Reported-by: Jack Mitchell <ml@embed.me.uk>
Reported-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>