thermal: devfreq_cooling: change tracing function and arguments

Prepare for deleting the static and dynamic power calculation and clean
the trace function. These two fields are going to be removed in the next
changes.

Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org> # for tracing code
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>