Update rcar thermal dt-binding to  add R8A77995 info.
Signed-off-by: NYoshihiro Kaneko <ykaneko0929@gmail.com>
Reviewed-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: NRob Herring <robh@kernel.org>
Reviewed-by: NSimon Horman <horms+renesas@verge.net.au>
Signed-off-by: NEduardo Valentin <edubezval@gmail.com>