Build the generic thermal driver as module "thermal_sys".

Make ACPI thermal, video, processor and fan SELECT the generic
thermal driver, as these drivers rely on it to build the sysfs I/F.
Signed-off-by: NZhang Rui <rui.zhang@intel.com>
Acked-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NLen Brown <len.brown@intel.com>

The THERMAL_MAX_TRIPS value is set to 10.  It is too few for the Compaq AP550
machine which has 12 trip points.
Signed-off-by: NKrzysztof Helt <krzysztof.h1@wp.pl>
Cc: Len Brown <lenb@kernel.org>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

This fixes the build, but acpi_fan_add() still needs
to be updated to handle thermal_cooling_device_register()
returning NULL as a non-fatal condition.
Signed-off-by: NLen Brown <len.brown@intel.com>

Fix an imprecision in CELSIUS_TO_KELVIN and move these
two macroes to a proper place.
Signed-off-by: NZhang Rui <rui.zhang@intel.com>
Signed-off-by: NThomas Sujith <sujith.thomas@intel.com>
Signed-off-by: NLen Brown <len.brown@intel.com>

The Generic Thermal sysfs driver for thermal management.
Signed-off-by: NZhang Rui <rui.zhang@intel.com>
Signed-off-by: NThomas Sujith <sujith.thomas@intel.com>
Signed-off-by: NLen Brown <len.brown@intel.com>