thermal: intel: menlow: Get rid of this driver

According to my information, there are no active users of this driver in
the field.

Moreover, it does some really questionable things and gets in the way of
thermal core improvements, so drop it.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>