Add apis for platform thermal drivers to query for slope and offset
attributes, which might be needed for temperature calculations.
Signed-off-by: NRajendra Nayak <rnayak@codeaurora.org>
Signed-off-by: NEduardo Valentin <edubezval@gmail.com>
Signed-off-by: NZhang Rui <rui.zhang@intel.com>