Revert bc12308779f87ffe7d624c6b6dd982c5454882ea (thermal: delete ThermalGovernor.plot_temperature)

It's useful if you don't have trace_thermal plots and you want to plot
temperature.  While we are at it teach it a couple of tricks:
legend_label and ax.
2 files changed
tree: cfa667de1227f46c29f1b41a786e5955699cea6f
  1. cr2/
  2. doc/
  3. hooks/
  4. tests/
  5. .dir-locals.el
  6. .gitignore