tools/thermal: Remove unused 'mds' and 'nrhandler' variables

In the previous code, the 'mds' and 'nrhandler' variables were not
utilized in the codebase. Additionally, there was a potential NULL
pointer dereference and memory leak due to improper handling of memory
reallocation failure.

This patch removes the unused 'mds' and 'nrhandler' variables along with
the associated code, addressing the unused variable issue, NULL pointer
dereference issue and the memory leak issue.

Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230926173736.1142420-1-visitorckw@gmail.com

tools/thermal: Add util library

The next changes will provide a couple of tools using some common
functions provided by this library.

It provides basic wrappers for:

- mainloop
- logging
- timestamp

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Tested-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://lore.kernel.org/r/20220420160933.347088-3-daniel.lezcano@linaro.org