thermal: cpu_cooling: Reorder the header file

As the conditions are simplified and unified, it is useless to have
different blocks of definitions under the same compiler condition,
let's merge the blocks.

There is no functional change.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org>
Link: https://lore.kernel.org/r/20191030091038.678-2-daniel.lezcano@linaro.org