Thermal: Add ST-Ericsson DB8500 thermal properties and platform data.

This patch adds device tree properties for ST-Ericsson DB8500 thermal driver,
also adds the platform data to support the old fashion.

Signed-off-by: hongbo.zhang <hongbo.zhang@linaro.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>